Lava is targeting the budget-conscious smartphone user with both the Blaze Duo and the Z4. However, these phones represent distinctly different approaches: the Blaze Duo prioritizes processing power with a modern Dimensity chipset, while the Z4 aims for affordability with a more basic Helio G35. This comparison will dissect the key differences to help you determine which device best suits your needs.
🏆 Quick Verdict
For most users, the Lava Blaze Duo is the superior choice. Its Mediatek Dimensity 7025 chipset delivers significantly better performance and future-proofing than the Helio G35 in the Z4. While the Z4 offers a lower entry price, the performance trade-offs are substantial, impacting everything from app responsiveness to gaming.
| Network |
|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 | GSM 900 / 1800 |
| 3G bands | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 900 / 2100 |
| 4G bands | 1, 3, 5, 7, 8, 20, 28, 38, 40, 41 | 1, 3, 5, 8, 40, 41 |
| 5G bands | 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78 SA/NSA | - |
| Speed | HSPA, LTE, 5G | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps |
| Technology | GSM / HSPA / LTE / 5G | GSM / HSPA / LTE |
| Launch |
|---|
| Announced | 2024, December 10 | 2021, January 07 |
| Status | Available. Released 2024, December 20 | Available. Released 2021, January 11 |
| Body |
|---|
| Build | - | Glass front, plastic back, plastic frame |
| Dimensions | 162.4 x 73.9 x 8.5 mm (6.39 x 2.91 x 0.33 in) | 164.5 x 75.8 x 9 mm (6.48 x 2.98 x 0.35 in) |
| SIM | Nano-SIM + Nano-SIM | Nano-SIM + Nano-SIM |
| Weight | 186 g (6.56 oz) | 190 g (6.70 oz) |
| Display |
|---|
| Protection | - | Corning Gorilla Glass 3 |
| Resolution | 1080 x 2400 pixels, 20:9 ratio (~395 ppi density) | 720 x 1600 pixels, 20:9 ratio (~270 ppi density) |
| Size | 6.67 inches, 107.4 cm2 (~89.5% screen-to-body ratio) | 6.51 inches, 102.3 cm2 (~82.1% screen-to-body ratio) |
| Type | AMOLED, 120Hz | IPS LCD |
| Platform |
|---|
| CPU | Octa-core (2x2.5 GHz Cortex-A78 & 6x2.0 GHz Cortex-A55) | Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53) |
| Chipset | Mediatek Dimensity 7025 (6 nm) | Mediatek MT6765G Helio G35 (12 nm) |
| GPU | IMG BXM-8-256 | PowerVR GE8320 |
| OS | Android 14, planned upgrade to Android 15 | Android 10 |
| Memory |
|---|
| Card slot | No | microSDXC (dedicated slot) |
| Internal | 128GB 6GB RAM, 128GB 8GB RAM | 64GB 4GB RAM |
| | - | eMMC 5.1 |
| Main Camera |
|---|
| Dual | 64 MP, (wide), PDAF
2 MP (macro) | - |
| Features | LED flash | LED flash |
| Single | - | 13 MP, f/2.0 AF |
| Triple | - | 13 MP, f/1.9, (wide), 1/3.0", 1.12µm, AF
5 MP, (ultrawide)
Auxiliary lens |
| Video | Yes | 1080p@30fps |
| Selfie camera |
|---|
| Features | - | LED flash |
| Single | 16 MP, (wide) | 16 MP, f/2.0, (wide), 1/3.06" 1.0µm |
| Video | 1080p@30fps | 1080p@30fps |
| Sound |
|---|
| 3.5mm jack | - | Yes |
| 35mm jack | No | Yes |
| Loudspeaker | Yes | Yes |
| Comms |
|---|
| Bluetooth | 5.2, A2DP, LE | 5.0, A2DP, LE |
| NFC | No | No |
| Positioning | GPS | GPS |
| Radio | Unspecified | FM radio |
| USB | USB Type-C 2.0, OTG | USB Type-C |
| WLAN | Wi-Fi 802.11 b/g/n/ac, dual-band | Wi-Fi 802.11 b/g/n, Wi-Fi Direct |
| Features |
|---|
| Sensors | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass | Fingerprint (rear-mounted), accelerometer, proximity |
| Battery |
|---|
| Charging | 33W wired | - |
| Stand-by | - | Up to 270 h |
| Talk time | - | Up to 24 h (2G) / Up to 15 h 30 min (3G) |
| Type | Li-Po 5000 mAh | Li-Po 5000 mAh |
| Misc |
|---|
| Colors | Arctic White, Celestial Blue | Blue, Red |
| Models | - | S7 |
| Price | ₹ 14,299 | About 100 EUR |
| SAR | - | 0.52 W/kg (head) 0.64 W/kg (body) |
Lava Blaze Duo
- Significantly faster processor for smoother performance
- More efficient chipset for better battery life
- Faster 33W charging
- Potentially better camera image processing
- Likely higher price point
- May generate more heat under sustained load (though 6nm helps)
Lava Z4
- Lower price point
- Potentially longer battery life due to less demanding chipset
- Simpler user experience for basic tasks
- Lightweight and easy to handle
- Slow processor struggles with demanding apps
- Poor gaming performance
- Slower charging speeds
- Limited future-proofing
Display Comparison
Display specifications are not provided, so a direct comparison is limited. However, given the price points, both devices likely utilize LCD panels. The Z4, with its older chipset, may have lower brightness and color accuracy. The Blaze Duo, benefiting from a more modern platform, *could* support features like higher refresh rates, though this is unconfirmed. Bezels are likely comparable, reflecting the budget nature of both phones.
Camera Comparison
Camera details are limited. However, the chipset difference indirectly impacts camera performance. The Dimensity 7025 includes a more powerful Image Signal Processor (ISP), enabling faster image processing and potentially better low-light performance. While both phones likely feature similar megapixel counts in their main sensors, the Z4’s Helio G35 will be limited in its ability to fully utilize the sensor’s potential. Expect the Blaze Duo to produce sharper, more detailed images with better dynamic range. Any 2MP macro or depth sensors on either device should be considered supplementary features with limited real-world utility.
Performance
The core difference lies in the chipsets. The Lava Blaze Duo’s Mediatek Dimensity 7025 (6nm) is a substantial upgrade over the Lava Z4’s Helio G35 (12nm). The Dimensity 7025 features a more modern CPU architecture – Cortex-A78 cores alongside A55s – compared to the Z4’s all-Cortex-A53 configuration. This translates to a significant performance advantage in CPU-intensive tasks. The 6nm process node of the Dimensity 7025 also offers better power efficiency, meaning less heat generation and potentially longer sustained performance. The Helio G35, while capable of handling basic tasks, will struggle with demanding applications and multitasking. The GPU within the Dimensity 7025 will also provide a far superior gaming experience.
Battery Life
Battery capacity is not specified. However, the Dimensity 7025’s 6nm process contributes to better power efficiency, potentially offsetting a smaller battery capacity compared to the Z4. The Blaze Duo’s 33W wired charging is a significant advantage, allowing for much faster charging times than the Z4, which likely supports a slower charging rate. This faster charging is particularly beneficial given the performance demands of the Dimensity 7025, as users may be more inclined to top up the battery more frequently.
Buying Guide
Buy the Lava Blaze Duo if you need a phone capable of handling demanding apps, multitasking, and occasional gaming without significant lag. It’s ideal for users who value a smoother, more responsive experience. Buy the Lava Z4 if your primary needs are basic communication – calls, texts, and light social media – and you prioritize absolute affordability above all else. It’s a suitable option for first-time smartphone users or those on a very tight budget.
Frequently Asked Questions
❓ Will the Lava Z4 be able to run popular games like PUBG Mobile or Call of Duty?
While the Z4 *can* technically run these games, the Helio G35 chipset will likely struggle to maintain a stable frame rate, even on the lowest settings. Expect significant lag and a compromised gaming experience. The Lava Blaze Duo, with its Dimensity 7025, is far better suited for mobile gaming.
❓ Is the difference in chipset performance noticeable for everyday tasks like browsing and social media?
Yes, the difference is quite noticeable. The Dimensity 7025 in the Blaze Duo provides a much smoother and more responsive experience when switching between apps, scrolling through webpages, and using social media. The Z4’s Helio G35 may exhibit noticeable lag and slowdowns, especially with multiple apps open.
❓ How much faster is the 33W charging on the Lava Blaze Duo compared to the Z4?
Without knowing the Z4's charging wattage, it's difficult to give an exact number. However, 33W is significantly faster than the typical charging speeds found in budget phones. Expect the Blaze Duo to charge from 0-100% in approximately 60-90 minutes, while the Z4 could take upwards of 2-3 hours.
