I was actually able to listen to both the LCD-2 revisions from a fellow head-fier who had both for sale, and I actually preferred the first revision more than the 2nd. The rev1 had stiffer pads and are slightly heavier on the head. However, I did not like the leather headband on the rev2 since they created uneven pressure points on my head. Overall comfort prize would go to the rev2 if they had the foam headband.
The two sounded quite a bit different despite their many similarities. The rev2s were brighter and had a slightly larger sound stage. They are definitely more detailed but I thought the rev2's bass quantity paled in comparison to the rev1s. I ended up going for the rev1's since they were cheaper and I just preferred the smoother sound a bit more for my taste in music.