So I hit with the 18x20 in stock form today (stock grip, Sensation strings) and it was good but I didn't love it. It certainly had the maneuverability that I am familiar with from my PSC, HPS and NCode 6.1 16x18, but it felt... lower powered. I guess this is to be expected, that the 18x20 has less power / more control than my 16x18s. It also felt less solid and a little more hollow versus the earlier models I mentioned. But this could be because I haven't added a leather grip to the new racquet yet, which I plan to do this coming week. On all my other 6.1s I use a leather grip plus overgrip. I can say that my slice on the 18x20 was amazing. Didn't notice much of a difference in topspin. Versus the RF97, the 18x20 almost feels a bit flimsy. Maybe I'm exaggerating, but my RF97 (the black one) just feels like it is going to flatten the ball when I swing it. I only had an easy hit today, so had ample time to prepare my shots and did not feel any difference in maneuverability between the RF97 and the 18x20 (I have a OHBH). Maybe in an intense rally the 18x20 which has the same balance point but is lighter can swing faster...but not sure.
So, it will take some time to make a complete comparison. I will say that while the paintjob has a clean look and is good, I wish the red Wilson logo on the throat and the red bands at 3 and 9 were a slightly darker red (a real red - which is the color of the buttcap). The red that Wilson used is sort of pinkish red, kinda gives the racquet a feminine look. And Wilson should go back to glossy finishes. The soft, matte finish of the white paint looks a little cheap in my opinion. Probably just me but I definitely prefer the paintjobs of the PSC, HPS and Ncode.
I feel like I need to get the PSC 25th Anniversary now... but... I have too many damn racquets already...!!!