Chipset architecture tells a lot about a phone's long-term capability. The Realme 15 5G runs on the MediaTek Dimensity 7300 built on a 4 nm process, while the Galaxy A26 5G uses the Samsung Exynos 1380 on a 5 nm node. The smaller fabrication process on the Realme generally translates to better power efficiency — the chip does more work per watt, which benefits both sustained performance and battery longevity under load. Geekbench 6 scores reflect this advantage: the Realme leads in both single-core (1026 vs 1007) and multi-core (2932 vs 2758) results, confirming a consistent, if moderate, performance edge across everyday and multi-threaded tasks.
Memory is where the gap widens considerably. The Realme 15 ships with 12 GB of RAM running at 6400 MHz, compared to the A26 5G's 8 GB at 3200 MHz. The doubled memory bandwidth means the Realme can feed data to the CPU and GPU far more quickly — a real advantage in gaming, heavy multitasking, and keeping many apps live in memory simultaneously. Storage is similarly lopsided: 512 GB on the Realme versus 256 GB on the Samsung, and the Realme supports a maximum of 16 GB RAM versus the A26 5G's hard ceiling of 8 GB, limiting its upgrade path. GPU clock speed also favors the Realme at 1047 MHz against 950 MHz, giving it a modest but real edge in graphics-intensive scenarios.
Across every measurable performance dimension — chipset efficiency, raw benchmark scores, RAM capacity, memory speed, and storage — the Realme 15 5G holds a clear and consistent advantage. The Galaxy A26 5G is a competent mid-ranger, but users who prioritize speed, multitasking headroom, or future-proofing will find the Realme the stronger choice here.