Benchmarks comparing the CPU and GPU performance of the Snapdragon 835 and Exynos 8895 models of Samsung Galaxy S8 Plus show that while the CPUs of the two models are roughly on par, the GPU of the Exynos model is slightly faster. For those unfamiliar, Exynos SoCs, which are found in Galaxy S8 models around the world, are produced in-house by Samsung Electronics. Meanwhile, US models of Galaxy S8 are powered by Snapdragon 835, which is developed by Qualcomm. Based on the testing done by GSM Arena, the two SoCs trade blows in the CPU benchmarks, with one SoC slightly faster than the other depending on the benchmark. Snapdragon 835 wins in the single-core benchmark of Geekbench 3 and Antutu 5, while Exynos 8895 SoC wins in Antutu 6 and the multi-core benchmark of Geekbench 3.
The benchmarks used to measure GPU performance tell a different story, with Exynos 8895 gaining a small but consistent lead over the Snapdragon 835 in both offscreen and onscreen tests. Since the test compares two models with the same display resolution, the only likely factor to affect the onscreen tests is the SoCs themselves. The lead of Exynos 8895 over the Snapdragon SoC ranges from as low as 1fps in GFX 3.1 car scene onscreen test to a maximum of 5fps in GFX 3.0 Manhattan onscreen test. Basemark X, which measures the gaming and graphics performance of the SoCs, shows that Exynos 8895 SoC substantially leads the models equipped with Snapdragon 835 with a score of 43862 for Exynos and 34951 for the Snapdragon. Another graphics benchmark, the Basemark ES 3.1/Metal, shows that Exynos SoC still leads with a score of 1111 versus Snapdragon 835's 817.
The differences between SoCs in terms of the benchmark performance, even if it is only a slight difference, can be expected due to the difference in the components of each chip. However, one could note the improvement in the relative CPU performance of Snapdragon SoCs and the relative GPU performance of the Exynos SoCs compared to those used last year in the Galaxy Note 7. Snapdragon 835 SoCs have caught up with the CPU deficit its predecessor had compared to its counterpart in the Exynos SoC line as the Snapdragon SoCs include the newer Kryo 280 core. The Exynos 8895, meanwhile, has not only caught up but even exceeded the performance of the Adreno GPU. Within the Exynos 8895 GPU, some of the improvements Samsung made are the inclusion of Mali G71 GPU, which is based on the new Bifrost architecture of ARM, and the use of a higher GPU configuration (MP20) compared to last year (MP12).