MediaTek has been accused of artificially inflating benchmark scores on some of their devices. The shortcoming came to light when a reviewer found that a Helio P95 chip outperformed a Dimensity 1000L in PCMark. Some digging revealed that MediaTek has 'whitelists' for popular benchmarking apps. Whitelisted apps are allowed to push the device's SoC far beyond its limit, resulting in higher benchmark scores.
https://www.notebookcheck.net/MediaTek-accused-of-cheating-in-a-host-of-popular-mobile-benchmarking-tests.460226.0.html