I went to the Trek archives, and the main thing I could see that was different on those 2 bikes was one had carbon seat stays (the 2200) and the other didn't. The components were pretty similar (both really good). Carbon stays will give a more comfortable ride to an aluminum bike. Of course, condition of the bikes should be a big factor in your decision, as well as fit if they're different sizes.
I didn't even look at the geometry charts because I admit I wouldn't be able to offer any insight from them.
Last edited by redrhodie; 08-04-2010 at 03:57 AM.
'02 Eddy Merckx Fuga, Selle An Atomica
'85 Eddy Merckx Professional, Selle An Atomica
'10 Soma Double Cross DC, Selle An Atomica
Slacker on wheels.