I have limited time on Ti Fats, so it's hard for me to compare, but I do currently have a McMahon Ti which I like a lot. Frames were made for McMahon by two companies, Litespeed and TST or Sandvik. Mine is a Litespeed and is basically a 93/94 Litespeed Obed. It is light and I like how it handles, but I do not like the 'quick change' dropouts that Litespeed liked to use. They are vertical dropouts with a bit of a flared opening so you can get a wheel in and out quicker, but the section were the axle sits is so short that I can yank a wheel out of alignment if I stand up and hammer. I've solved that issue to a degree by using a King Classic Full Heavy Duty which forgoes QR for big 10mm bolts.
Quality is very good. Ride is very nice and flickable I guess. I know Colker says he thought his Litespeed felt dull, but I can't figure out where he came up with that when I ride mine. If I were to sell off all of my 26" wheel bikes but one, this is the one I would probably keep.
As it sits right now it weighs at or just under 23lbs, which is about 3lbs lighter than my Yo.
Oh, and not to knock Ti Fats, but it's not like Fat cranked out very many of them, and I know they were all kind of a exercise in continuing education for whoever welded them up. Companies like Litespeed, Merlin and TST, well, that's all they did and they did it a lot, so consistancy was high. Yes I have seen frames from those companies crack, but there are also plenty of examples of early sleeved Ti Fats failing too.