Well, the T43 is sitting on a mousepad, so that raises it about 1/8" or so.
the Ferrari is thin, not quite as thin as the T43, but about as thin as a T22.
It's a bit thicker in the back than it is in the front, and with the rubber standoffs, definitely sits a bit higher than the IBM does.
Build quality on the Ferrari is 2nd only to IBM from my experience, although I keep hearing good things about the Asus line of laptops...
These are the 2 leaders of their respective classes(14" form factor, 15.4" form factor respectively), as far as I'm concerned.