Ok Ezdrummer is gonna be a lot better than it is now but it aint no revolution, they’re still way behind Jamstix when it comes to song building a drum track and after watching a badly shot promotional video of it, EZ Drummer 2 presentation at British Grove Studios - YouTube it seems like they’re trying to catch up… yeah the drum sounds are much better in ezdrummer IMHO but revolutionary, I think not, they haven’t introduced anything Jamstix hasn’t been doing for yonks.
I like the video presentation looks like an advanced version from the basic one I got for free with my Korg synth. I use it sometimes for drum tracks ideas for songs. Nice software but electronic drum sounds are my thing therefore I sometimes carefully mix both or use it with an electronic kit. I’ve never used jamstix but from what your saying they’re a step ahead. Groove Agent SE 4 is also very cool. I use triebwrek loops and sounds a lot.