I'm confused 2060s vs 3060 vs 3070

I was using website userbenmark to compare 3 graphic card but i got confused. It say 2060s have equal performance with 3060. 3070 is 49% better than 3060 but 28% better than 2060s. I'm confused. Isn't supposed to have the same performance

Edit : thank you all for the info. Now i will avoid that website like it's a plague 👍