I'm almost through my first set of EXPs...
The stock tires lasted about 7,000 miles. They still had some life left, but I was leaving on a trip. Replaced with Metzeler Tourance (not EXP).
The Tourances lasted me around 17,000 miles. Again, with a bit of tread left, I swapped them out for EXPs.
The EXPs now have about 6,000 miles on them, and they're nearing the end of their life... maybe 2-3,000 remaining.
I didn't perceive a performance difference between the Tourance and the Tourance EXP, although given the abrupt increase in tire wear, I have to assume the EXPs are stickier. As is, I thought both the Tourance and the Tourance EXP were equally impressive when it came to riding in the rain, gravel, or twisties.
What I don't like about the EXPs is the mileage. It appears that I'm going to get about half the mileage out of the EXPs as I did the regular Tourance. When time comes to change again, I'm going back to regular Tourance, if still available.
I had a similar experience on my Wee. Got about 6,000 miles on the rear EXP, completely squared off much earlier. I got about 10k out of the stockers. I am guessing the regular Tourances should give me significant more mileage.
Regarding handling, the Tourance and EXP feel very different, IMO. The EXP is a very stable tire in the turns and feels a bit stickier. The Tourance handles very well too, but I think the EXP is better. Being on my 3rd set of Tourances (on multiple bikes) I have always found the Tourance "falls over" very quickly, which you get used to easily. The EXP doesn't fall over like the Tourance. The Tourance also feels harder and I would expect the Tourance to bite into dirt and gravel better than the EXP, although I didn't really get a chance to test the EXPs in the dirt.
I never had the front tire wobble on the EXP that others have spoken of with the Tourance. Now that I have my new Tourances installed, the front tire does wobble a bit on deceleration, but its only noticeable if I take my hands off the bars while decelerating.
I will not be buying the EXP again as the handling properties of the EXP do not seem to make up for the excess wear. I ride plenty of miles , so I need the extra mileage. After I go through my current Tourances, I will probably have an even better opinion.