They're both 25 inch frames too, unless my eyes are playing tricks? Same year, same model, same size. Funnier still is this bike shouldn't really fit me, but with seatpost just peaking out, my leg is at the perfect bend. I swapped over the almost broken in B17 from the X0-3, and can already tell this is going to be one comfortable ride. The handlebars are at the exact height and reach, pedals not too far forward or back. Everything seems like it was made for me. It's just about complete. Decals, string the cables, clean out the cassette, true the rear wheel, etc. Little stuff in other words.,,,,BD