Isn't stiffness relative to the player? I mean, take two players at identical skill levels, the only difference is one players weighs 140lbs, the other is 200lbs. You put both of them in the same exact skate and the results will vary.
The reason I mention this is because I sort of had one of those ah-ha moments with skates. Up until late 2019 I was fairly happy with my Vapor 1X 2.0. I really like the injected lacing and the flex lock tongue and that skate looked awesome. I was bored one day so I started looking at skates on SS. I found a used pair of pro stock 70k's with edge holders. They were my size and crazy cheap. I figured what the hell. If I hate em, I'll flip or keep them for pond skates. Turns out, there was an immediate boost to my skating. Things I struggled with were no longer an issue and there were certain things I found myself doing that I was not able to in other skates.
This tells me, fit is not really king. I don't think my ribcors fit perfectly. My heel is locked in, I don't have any lace-bite issues but there is some negative space in the toe box that's not there in the vapors. Yet they still out perform the vapors by a wide margin, and I think the Vapor is a much better skate. I've worn the vapors once since I got the ribcors. That was after I decided to convert them to inlines. Zero regrets.