I think a fairer comparison would be between the 1/16 Summit and the Savage XS if you want to compare oranges to oranges. Jang at URC reviewed both, and seemed to like the Summit better.
Savage XS Review:
http://www.youtube.com/watch?v=OSd1uSHStn0
1/16 Summit VXL Review:
http://www.youtube.com/watch?v=vRP8J2y6_QY