The BLU J4, powered by the Qualcomm Snapdragon 615, represents an older generation of budget smartphones. The BLU G53, however, features a more modern CPU architecture. This comparison dissects the differences between these two devices, focusing on how the CPU upgrade translates to real-world performance and whether it justifies any potential trade-offs.
🏆 Quick Verdict
For most users, the BLU G53 is the superior choice due to its significantly more capable CPU. The Cortex-A75 core provides a substantial performance boost over the J4’s Cortex-A7, making the G53 noticeably faster in everyday tasks and more suitable for demanding applications. However, the J4 remains a viable option for extremely basic use cases.
| Network |
|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G bands | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 |
| 4G bands | 3, 40 | 2, 3, 4, 5, 7, 12, 17, 28, 66, 71 |
| Speed | HSPA 21.1/5.76 Mbps | HSPA, LTE |
| Technology | GSM / HSPA | GSM / HSPA / LTE |
| Launch |
|---|
| Announced | 2019, October. Released 2019, October | 2023, June |
| Status | Discontinued | Available. Released 2023, July |
| Body |
|---|
| Build | - | Glass front, plastic frame, plastic back |
| Dimensions | 151 x 72.3 x 10 mm (5.94 x 2.85 x 0.39 in) | 164.8 x 75.8 x 8.9 mm (6.49 x 2.98 x 0.35 in) |
| SIM | Nano-SIM + Nano-SIM | Nano-SIM + Nano-SIM |
| Weight | 158 g (5.57 oz) | 200 g (7.05 oz) |
| Display |
|---|
| Protection | Corning Gorilla Glass 3 | - |
| Resolution | 720 x 1440 pixels, 18:9 ratio (~293 ppi density) | 720 x 1600 pixels, 20:9 ratio (~270 ppi density) |
| Size | 5.5 inches, 78.1 cm2 (~71.5% screen-to-body ratio) | 6.5 inches, 102.0 cm2 (~81.7% screen-to-body ratio) |
| Type | IPS LCD | IPS LCD |
| Platform |
|---|
| CPU | Quad-core 1.3 GHz Cortex-A7 | Quad-core (1x2.0 GHz Cortex-A75 & 3x1.8 GHz Cortex-A55) |
| Chipset | Qualcomm MSM8939 Snapdragon 615 (28 nm) | - |
| GPU | Mali-400 | IMG8322 |
| OS | Android 8.1 Oreo (Go edition) | Android 13 |
| Memory |
|---|
| Card slot | microSDXC | microSDXC |
| Internal | 32GB 1GB RAM | 64GB 4GB RAM |
| | eMMC 5.1 | - |
| Main Camera |
|---|
| Dual | - | 13 MP, f/2.0, (wide)
Auxiliary lens |
| Features | LED flash | LED flash, HDR, panorama |
| Single | 8 MP, AF | - |
| Video | 720p@30fps | 1080p@30fps |
| Selfie camera |
|---|
| Single | 8 MP | 8 MP, f/2.0 |
| Video | 720p@30fps | 1080p@30fps |
| Sound |
|---|
| 3.5mm jack | Yes | - |
| 35mm jack | Yes | Yes |
| Loudspeaker | Yes | Yes |
| Comms |
|---|
| Bluetooth | 4.1, A2DP, LE | 5.0, A2DP, LE |
| NFC | No | No |
| Positioning | GPS | GPS |
| Radio | FM radio | FM radio |
| USB | microUSB 2.0 | USB Type-C 2.0 |
| WLAN | Wi-Fi 802.11 b/g/n, Wi-Fi Direct | Wi-Fi 802.11 b/g/n/ac, Wi-Fi Direct |
| Features |
|---|
| Sensors | Accelerometer | Fingerprint (side-mounted), accelerometer |
| Battery |
|---|
| Stand-by | Up to 210 h | - |
| Talk time | Up to 8 h | - |
| Type | Li-Po 2200 mAh, removable | Li-Po 5000 mAh |
| Misc |
|---|
| Colors | Blue, Black, Brown | Pearl, Black, Green, Violet, White |
| Models | YU5510A, YU5510 | - |
| Price | About 70 EUR | About 100 EUR |
BLU J4
- Potentially lower price point
- Proven reliability (older model)
- May be easier to find replacement parts
- Significantly slower CPU performance
- Less efficient processor
- Outdated software support
BLU G53
- Much faster CPU performance
- More efficient processor
- Likely better software support
- Improved image processing
- Potentially higher price
- May have shorter software update lifespan than flagship devices
Display Comparison
Display specifications are not provided for either device. Given the market segment, both likely feature 720p LCD panels. The J4, being older, may have wider bezels. Color accuracy is likely similar on both, leaning towards the standard sRGB color space. Without specific data, it's reasonable to assume the G53 benefits from slightly improved display technology due to its newer release date, potentially offering better viewing angles.
Camera Comparison
Camera specifications are not detailed. Given the price point of both devices, expect basic camera setups. The G53 likely benefits from improved image signal processing (ISP) capabilities integrated within its newer CPU, potentially resulting in better image quality, especially in low-light conditions. The J4’s ISP is likely more limited, leading to softer images and less dynamic range. Without sensor size or aperture information, a definitive camera comparison is impossible, but the G53 has a clear advantage due to its modern processor.
Performance
The core difference lies in the CPU. The BLU J4’s Qualcomm MSM8939 Snapdragon 615 utilizes four Cortex-A7 cores clocked at 1.3 GHz. This is a 28nm architecture, known for its power efficiency but limited performance. The BLU G53, conversely, employs a quad-core CPU with a single high-performance 2.0 GHz Cortex-A75 core and three efficiency-focused 1.8 GHz Cortex-A55 cores. The Cortex-A75 represents a significant architectural leap, offering substantially higher IPC (Instructions Per Clock) than the A7. This translates to faster app loading times, smoother multitasking, and improved responsiveness in the G53. The G53 will excel in tasks like web browsing and social media, while the J4 may exhibit noticeable lag.
Battery Life
Battery capacity is not specified for either device. However, the Snapdragon 615 (J4) is a 28nm chip, while the G53’s CPU is likely built on a more efficient node (though unspecified). This suggests the G53 may achieve comparable or better battery life despite potentially having a similar capacity battery. Charging wattage is also unknown, but the G53’s newer chipset may support faster charging protocols, reducing 0-100% charge times.
Buying Guide
Buy the BLU J4 if you need a functional smartphone for the absolute essentials – calls, texts, and light web browsing – and prioritize maximum affordability. You're accepting a slower experience in exchange for a lower price point. Buy the BLU G53 if you prefer a smoother, more responsive experience, especially when multitasking or using apps that require more processing power. The G53 is the better choice for anyone who wants a phone that feels modern and capable.
Frequently Asked Questions
❓ Will the BLU G53 handle popular social media apps like TikTok and Instagram smoothly?
Yes, the BLU G53’s Cortex-A75 CPU is significantly more powerful than the J4’s Cortex-A7. This means smoother scrolling, faster loading times, and a more responsive experience when using demanding apps like TikTok and Instagram. The J4 may struggle with these apps, exhibiting lag and stuttering.
❓ Is the difference in CPU performance noticeable for everyday tasks like making calls and sending texts?
While both phones will handle basic tasks like calls and texts, the G53 will feel noticeably snappier when switching between apps or opening new ones. The J4’s older processor may exhibit a slight delay, especially if multiple apps are running in the background. The G53 provides a more fluid and responsive user experience overall.
❓ How does the Snapdragon 615 in the J4 hold up over time with software updates?
The Snapdragon 615 is an older chipset, and the BLU J4 is likely nearing the end of its software support lifecycle. Updates may become infrequent or cease altogether, potentially leaving the device vulnerable to security risks and lacking new features. The G53, being newer, should receive updates for a longer period.
