I had a short hit with it tonight. Honestly, it was hard to put the PSVS down because I was hitting the ball so well with it and it felt so good, but I did break it out for a few tfiebreakers at the end of the night, and it was a good experience. Of course, it's not a direct apples to apples comparison, mainly because the strings are different, and that obviously changes things up a lot. But, I've hit with enough string combos in the PSVS for that not to matter too much, and I would say that it basically feels like the exact same racquet, but slightly more muted, perhaps. To me, that is not a real benefit, because the PSVS is already comfortable, but I think that is what's lead to the comments from reviewers saying it is more plush with a bigger sweetspot. The sweetspot is not really any bigger, it's just that off center contact is perhaps a little less jarring. But, that dampening makes the sweetspot a bit less sweet as well.
I don't think I'll bother doing too much more hitting with this one as a demo, however. I learned what I wanted to learn, which is that it's basically the same exact racquet, with small change in feel. I will likely pick up a used one down the line so I can do a full comparison, but am not in a rush to do so.
Long story short, if you like the PSVS, I think you'll like the PS 97 almost as much - and maybe more depending on how you prefer racquets to feel in general. Actual playability is nearly identical, and any differences can be attributed to the different string.