What I've noticed different about this current frame versus my 2006 frame:

1.) Seat tube sections at the clamp points are seriously reinforced (thicker).
2.) Welds where the chainstays and seat tube meet the bottom bracket shell are far more substantial. Almost looks excessive (which is fine, by my experience). The weld spills over to the very edge of the bottom bracket shell on the drive side.
3.) Plastic weather seal integrated into the top headset locknut (now I won't need to resort to duct tape for rainy days).
4.) Stem riser redesign. Clamp is rotated to the side now. Much lighter than the 2006 version.
5.) Paint job looks thicker/more durable.
6.) No creaking at the seat tube junction point, even though I'm running the seat post without the light application of grease as originally recommended for the earlier Swifts.

I'm glad to see that Xootr has been refining/enhancing the frame design.