Other differences include the TTL being 3mm taller (to accommodate the extra electronics), the TTL meter display has three LEDs (under, over and correct) while the Classic has two (over, under, and both light evenly for correct exposure) and battery life on the Classic is up to 40% longer than the TTL (due to the less demanding electronics).
I'm in the camp who feels the TTL shutter dial goes the wrong way (but then I use mine alongside an M2 and an M3 so I would say that I guess). The TTL's dial actually goes the opposite way to every other camera I've ever owned, so I guess this is one detail that comes entirely down to personal taste and experience. I'm also not very sold on the 'newer is better' argument; how much it's been used and how it's been cared for are way more important than a few years in age.
That said, both are very, very fine cameras and, unless you have a strong preference either way, I'd recommend simply going for whichever turns up first in the right condition at the right price.