The first generation of Cat Maples had 45 degree bearing edges. For the 2nd generation onwards they changed to rounded 30 degrees edges (I think) and they also changed from 6 lugs to 5 lugs on the rack toms. A bit more 'Gretschy'. Also the tom mounting system was changed for 2nd gen onwards
I have a 1st gen Cat Maple (6 piece) and it is great. Solidly built, and a great sounding workhorse kit for a reasonable price. I don't use the stock snare.
Some have mentioned issues with variable finish quality of bearing edges (on later kits I think) so that is worth checking.