Vivo T4x 5G (128GB / 8GB RAM) VS Vivo Y31 Pro 5G

In terms of design, the Vivo T4x 5G and the Vivo Y31 Pro 5G are virtually identical twins. Both share the exact same physical footprint — 165.7 mm tall, 76.3 mm wide, and 8.1 mm thick — resulting in the same total volume of 102.41 cm³. Neither device folds, and neither carries a rugged build certification.

The only measurable difference between the two is weight: the T4x 5G comes in at 204 g, while the Y31 Pro 5G is marginally heavier at 208 g. A 4-gram gap is imperceptible in everyday use — you would not notice it switching between the two — so this cannot meaningfully be called an advantage. Both phones also share an IP64 rating, meaning they offer the same level of dust and water resistance: full protection against dust ingress and resistance to water splashing from any direction, though neither is rated for submersion.

For this spec group, the two devices are effectively tied. There is no practical design differentiator to guide a purchase decision here — buyers should look to other spec groups such as performance, display, or battery to find meaningful distinctions between these two models.

Both the Vivo T4x 5G and the Vivo Y31 Pro 5G feature an identical display panel: a 6.72″ LCD IPS screen running at 1080 x 2408 px with a pixel density of 393 ppi and a 120Hz refresh rate. At this resolution and size, sharpness is genuinely good — text and images appear crisp and detailed in everyday use. The 120Hz refresh rate ensures smooth scrolling and responsive touch interactions, which is a meaningful quality-of-life feature at this price tier.

The sole differentiator in this group is branded damage-resistant glass: the Y31 Pro 5G has it, while the T4x 5G does not. In practice, this means the Y31 Pro 5G′s display is less susceptible to scratches and minor impacts from everyday hazards like keys or drops onto hard surfaces. For users who tend to use their phones without a case, this is a genuinely relevant advantage — screen repairs or replacements are a common and costly pain point.

The Vivo Y31 Pro 5G takes a clear edge in this category solely due to its damage-resistant glass. Every other display specification is a dead heat between the two. If screen durability matters to you — and it should — the Y31 Pro 5G is the stronger choice here.

Under the hood, both phones are built around the same foundation: the MediaTek Dimensity 7300 chipset, fabbed on a 4 nm process, paired with 8GB of LPDDR5 RAM running at 6400 MHz and the Mali G615 MC2 GPU. This is a capable mid-range platform — the 4 nm node keeps power consumption in check while delivering solid sustained performance for daily multitasking, social media, and casual gaming. There is simply no meaningful hardware differentiation to speak of at the processor or memory level.

Geekbench 6 scores confirm this near-parity in real-world terms. The Vivo Y31 Pro 5G edges out a slightly higher multi-core score (2932 vs 2827), while the T4x 5G returns a marginally higher single-core result (1031 vs 1026). These differences — roughly 3–4% in either direction — fall well within normal benchmark variance and would be completely imperceptible in everyday use. Neither phone has a processing advantage over the other in any practical sense.

The one concrete differentiator here is internal storage: the Y31 Pro 5G ships with 256GB versus the T4x 5G′s 128GB. Double the base storage is a meaningful real-world advantage — it translates to more room for apps, photos, videos, and offline media without worrying about management. On raw compute, this is a tie; on storage, the Vivo Y31 Pro 5G holds a clear and practical edge.

Camera hardware is nearly identical across both devices. Each sports a dual rear camera system led by a 50 MP main sensor paired with a 2 MP secondary, sharing the same apertures, the same 4K 30fps video ceiling, and the same autofocus implementation — phase-detection for stills and continuous autofocus during video. The feature set is also a match: HDR mode, slow-motion, timelapse, panorama, and a solid suite of manual controls including ISO, exposure, white balance, and focus are all present on both phones.

The front camera tells a similar story — both are 8 MP shooters — with one minor distinction: the Y31 Pro 5G has a fractionally wider aperture of f/2.0 versus the T4x 5G′s f/2.1. In theory, a wider aperture admits slightly more light, which can help in dim selfie conditions, though the practical difference at this scale is marginal at best.

The most tangible differentiator is the rear flash: the Vivo Y31 Pro 5G carries 2 flash LEDs compared to the T4x 5G′s single unit. Dual-LED flash typically produces more evenly lit, natural-looking shots in low-light scenarios by reducing harsh shadows. It is a modest but real advantage in nighttime or indoor photography. Overall, the Y31 Pro 5G holds a narrow edge in this category — not by a dramatic margin, but its dual flash and slightly wider front aperture make it the slightly more capable camera package based on the available data.

When it comes to software, these two phones are completely indistinguishable. Both run Android 15 and share an identical feature set across every single spec in this category — from privacy controls like location and camera/microphone permissions, to usability staples like dark mode, split-screen multitasking, Picture-in-Picture, dynamic theming, and widget support. Neither receives direct OS updates, and neither supports features like Wi-Fi password sharing, focus modes, or PC mode.

This is a complete tie — there is not a single software differentiator to separate the two devices in this group. Buyers should not let operating system features factor into their decision between the T4x 5G and the Y31 Pro 5G, as the experience on both will be functionally identical out of the box.

Battery is another category where the two phones converge entirely. Both the Vivo T4x 5G and the Vivo Y31 Pro 5G pack a 6500 mAh cell — a generously sized battery by any standard, well above the typical 5000 mAh found in most mid-range competitors. In practice, this capacity comfortably supports heavy users through a full day and light-to-moderate users well into a second day without reaching for a charger.

Charging is equally matched: both support 44W fast charging and both ship with a charger in the box. At 44W, topping up a 6500 mAh battery from empty to a usable level takes a reasonable amount of time, and neither phone is left waiting while the other charges ahead. Wireless charging is absent on both, which is a common omission at this segment.

This is a straightforward tie. Every battery specification — capacity, charging speed, included accessories — is identical. The strong 6500 mAh capacity is a shared highlight worth noting, but it offers no basis for differentiation between the two models.

Audio hardware is a mirror image between the two phones. Both the Vivo T4x 5G and the Vivo Y31 Pro 5G offer stereo speakers — a welcome inclusion that makes media consumption, gaming, and speakerphone calls noticeably more immersive than a single mono driver. Neither device carries a 3.5mm headphone jack, so wired audio users will need a USB-C adapter or a wireless alternative.

On the wireless audio quality front, both phones skip higher-fidelity Bluetooth codecs entirely — no aptX, no LDAC, no aptX HD or Adaptive. This means audiophiles using wireless headphones will be limited to standard Bluetooth audio quality rather than lossless or near-lossless transmission. That said, this is a common trade-off at this price tier and unlikely to be a dealbreaker for the target audience.

With every audio specification identical across both devices, this category is an unambiguous tie. The shared stereo speaker setup is the standout feature here, but it provides no basis for choosing one phone over the other.

Across the broad connectivity landscape, these two phones are largely aligned — both support 5G, dual SIM, Bluetooth 5.4, USB Type-C, and an identical sensor suite including gyroscope, GPS, compass, accelerometer, and infrared. NFC is absent on both, which rules out tap-to-pay functionality for either device. The shared feature set is competent and well-rounded for the mid-range segment.

Two meaningful differences emerge on closer inspection. The Vivo T4x 5G supports Wi-Fi 6 (802.11ax) in addition to Wi-Fi 4 and 5, while the Y31 Pro 5G tops out at Wi-Fi 5 (802.11ac). Wi-Fi 6 brings tangible real-world benefits in congested environments — think dense apartment buildings or busy offices — offering better throughput, lower latency, and more efficient handling of multiple connected devices simultaneously. Conversely, the Vivo Y31 Pro 5G includes an external memory slot, allowing users to expand storage via a microSD card, while the T4x 5G offers no such option.

This creates a genuine trade-off. The T4x 5G is the stronger pick for users who prioritize network performance and future-proofing their wireless connectivity. The Y31 Pro 5G appeals more to those who value storage flexibility — particularly relevant given that even its larger 256GB base storage can fill up with media over time. Neither advantage cancels out the other cleanly, but for most users, Wi-Fi 6 support on the T4x 5G is arguably the more broadly useful differentiator in day-to-day use.

The miscellaneous category offers nothing to separate these two devices. Both the Vivo T4x 5G and the Vivo Y31 Pro 5G share every spec listed here: each has a video light, and neither features a sapphire glass display, a curved screen, or an e-paper panel. This is a complete tie with no differentiator of any kind — buyers can set this category aside entirely when making their decision.