Does the following statement make sense?
The heavier recoil spring also means that while the slide's recoiling, it's pressing harder back on the frame and on you.
The slide hitting, when it comes back, so hard as to throw the brass 20 to 50 feet is another nice indicator that you're getting more of a slam to your hand when this occurs.
I do not in the slightest dispute that others perceive no difference or no significant difference. That there IS no difference, though, or that no one would be affected by it, would be a different statement.