Well it depends entirely what you are doing with those processors.
It’s like taking an a new porsche 911, driving it in a straight line at 60MPH next to an older slower porsche 911 at the same speed and then concluding “Oh, so the new car must not be any better”.
Because you are only testing it against one limited situation. You would be ignoring the fact the newer car is more efficient, it can squeeze more power out of the same sized engine, it can manage it’s power better, it is more fuel efficient, it can accelerate quicker , handles better and has a faster top speed.
There are parallels with that analogy directly with processors. Energy efficiency, raw computing performance, the way it manages the power available to it, etc.