There's been so many different variations of the P100, the Wilson rep who let me hit with them can't even keep track of. There's no single version of P100/P98 that can be the definitive reference here.
I had hit with 2 iterations of the P100 that felt incredibly different(both snakeskin paint). First one from earlier in the year, that one felt way more gummy and less connected than the 2nd or the retail, and really lacked directional control. It felt like softer and more dampened than the P98 I hit from that same time. The rep and I both disliked it.
The 2nd iteration I hit with was closer to releases, just weeks before the "redline" name change around 2 months back. Wilson rep told me it's supposed to be from one of the last prototype batches manufactured before they stopped snakeskin production and shifted to making the retail version. P98 from that time did not feel that different than the 1st, still very light, medium firm, and not very forgiving or stable.
But the P100 from that batch was firmer than the 98 and near night and day vs the earlier P100 I tried. It was firm, stable, decently crisp but not raw/hollow, but certainly harder on the arm as well. Playability wise I don't find the retail redline I'm trying right now to be that different. But I am pretty sure of the improvements in comfort and minor change in feel. Still need to play more with different strings set ups with the retail in the coming months to know more.
But hopefully that can provide some context ^^ and help understand why we see such different opinions out there in the prototypes vs retail comparison. I want to share this perspective also to counter some of the illogical hype out there for the prototypes or "pro stock" being superior. I'm sure Khachanov, Dimitrov, and Rune can get whatever layup they prefer made for them. But from my conversation with Wilson insiders, most of the lower level pros and college players were just getting whatever versions of P98 their rep can ship at the time, as stock was in quite high demand among those players as well.
I doubt most people would prefer the first P100 I tried over the retail, and the most recent one plays very similarly but I question that less dampened firmness will be as welcomed on balance for the wider audience.