paddled both recently. First the plastic on the Shiva seems super thick and the boat is touch heavier (shiva large vs Villain L) not by much though. I enjoyed the fact that the Shiva is narrow at the knees thus making it easier for me to paddle a larger boat and get vertical strokes. That being said the new tide of change bringing us these large volume super soft edge boats has most of them feeling similar to me. I did not notice a huge speed or acceleration difference in the Shiva, I did on the Villain. I did notice on the Shiva that you can go into holes sideways and backward as it matters not, the huge volume that sits narrow and tall from the water is quite useful if you have your lean timing and brace correct. Quite unstoppable in my opinion (the huge volume has the most to do with this I think). The Villain (which I though was WAAAYYY to big sitting in it for the first time) turned out to be a little easier to roll and faster for me and not at all too big. I also liked the way it planed over holes having the volume as a secondary feature helping resurface your bow and retaining the speed to plane up over the holes. I never subbed out the Shiva large, I think that would take a 30'er or more to accomplish
Taking into consideration I still own and paddle the Jefe, I can say these new large volume boats I have been demoing have much better stability and resurfacing. They seem to boof about the same and scream into eddies a little better especially given their size, and if you get to know and use the secondary chines they offer (I need a bit more practice with that) I bet a playboat sports-car-like feeling is easily achieved.
Bare bones, the Shiva Large was a bit too big for me (I could get used to it @ 170# 6') but seemed stable, fast enough, nimble for the size, and really unbelievable with the surfacing/volume displacement thing going on all around it. The villain was faster, more agile, and had astounding bow resurfacing/displacement if you happened to plug a hole with low speed. Not sure it would perform the same going into a hole sideways but with those secondary chines you can probably control a surf well enough.
Well, I would gladly take either honestly...