I skied at 32 off and 35 off behind JohnE's 214 and didn't notice the rope hitting the tower, and John said it didn't. But I may not have been getting out wide enough since we found out later that the course was narrow by about 5 feet. At the shorter line lengths, I didn't even notice the wake. At longer line lengths, the wake had a more pronounced bump than on my 197, but definitely not bad.
The slalom wake obviously won't be as sweet as on your 190. If you're running 32 off and shorter, I don't expect the wake would be an issue at all. The boat is larger, but it fit through the boat guides in the course without problem. My wife found it very easy to drive through the course - it probably tracked better than our 197. All in all, it's a very nice all-around boat.
2003 Prostar 197 35th Anniversary
1990 Prostar 190