I'm just starting my second season boating, and this year I bought a CR250. I've never paddled the Jackson, so I can't compare much (I did sit in it and try it out). I actually thought the Jackson was slightly more comfortable (2006 model), but what I liked more about the CR250 were two things:
1) It's a 2006 new design, whereas Jackson's has been around a while. I figured I'd get in on the new design, and I've not been disappointed at all.
2) The outfitting of the CR 250 was more adjustable to my liking. I especially like the backband on the CR, because that's a very important thing to me having had a back surgery.
I'm really happy with the CR250 (again, I can't compare). I'm never uncomfortable in it, and I think it handles very well.