many differences in the shifter
I found there to be significant differences in the shifting feel between my 05 Elise and the 08 Exige. I also heard there were differences in the cable manufacturer and some of the lever arms. A magazine had an interview with someone at Lotus about the changes.
I also tried to reinforce the shift frame but found the holes no longer match up. Better, the new frame is wider and is attached more firmly to the chassis. As a result, running the bolt through the shift frame to the chassis is not necessary. (See my site for how to implement the shift reinforcement on the earlier cars.)
All in all, the changes are positive, with much less slop in at the shift knob. I also get the sense the shift movement is smaller, almost like a quick shift. However I have not measured the two. (Note: I never liked the idea of a quick shift kit. While you do not need to move the shift as much, you also make it more difficult to find the right spot. )