The Exynos 1000-powered Samsung Galaxy S21+ has made an appearance on Geekbench. It nets a single-core score of 1,038 and a multi-core score of 3,060, putting it behind the Qualcomm Snapdragon 875. However, the abysmal performance could also be the result of unoptimized software.
https://www.notebookcheck.net/Alleged-Galaxy-S21-Geekbench-listing-paints-a-grim-picture-of-the-Exynos-1000.495027.0.html
So around 25% less performance on multi core and 5-6% less performance on single core as well.
Yeah, Samsung is still screwing customers with their "flagship" phones.