Joined: Aug 2008
Posts: 13,127
Likes: 2,154
From: Ann Arbor, MI
Bikes: 15 Kinesis Racelight 4S, 76 Motebecane Gran Jubilée, 17 Dedacciai Gladiatore2, 12 Breezer Venturi, 09 Dahon Mariner, 12 Mercier Nano, 95 DeKerf Team SL, 19 Tern Rally, 21 Breezer Doppler Cafe+, 19 T-Lab X3, 91 Serotta CII, 23 3T Strada
I'm not sure what relationship you're getting at with the 'relaxed geometry' and height inseam thing, but looking at the numbers, the Gran Premio is more relaxed, with, in the 56cm size, a slightly slacker head tube angle, and a taller head tube. The GP also has a slightly longer wheelbase, but that's because the front-center is longer, but it will contribute to the bigger feel of the bike, probably.
I wouldn't call either particularly relaxed geometries, though, and rather nice, classic road geos, with a slightly sportier edge to the Super Mirage.