Yeah, there's always something, for sure...but I gotta say, the Ultimate is the way to go. I'm very happy with the vinyl seats I've got and I can't see paying more for the leather. To me, the Ultimate is narrower at the front of the seat, I noticed it right away. I know they say to take the seat for a long test ride, but I was hooked as soon as I sat on it the first time...both the fact that it seemed like a better shape at the nose of the seat and it being more bucketed than stock (stock is so flat). The backrest is great too - I hardly, if ever, ride without it. I'm 5'8", 190#, ~30" inseam...I wrote a little more on what I thought about my Ultimate compared to other seats I've tried here.

And FYI, straight from their website -
"
However, in my opinion, there are no advantages with a leather seat.
Most people cannot visually tell the difference between our premium Vinyl and Leather...Durability is similar but our premium Vinyl will hold its shape and new look longer than Leather...I believe a Vinyl seat is the best overall value.
"
- Touche.