Joined: Jul 2006
Posts: 9,158
Likes: 1,743
From: Lebanon (Liberty Hill), CT
Bikes: Canyon Aeroad, CAAD 12, MASI Gran Criterium S, Colnago World Cup CX, Guru steel & Guru Photon
Conventional wisdom says the smaller frame will be lighter and more maneuverable. It feels that way to me but I've never tested it other than the feel of riding. FWIW I ride a 55 Guru steel and a 58 Masi AL.