I was just looking at some dyno runs on a sportster forum and the avarage for a 1200 with the normal mods (air intake, pipes, ignition) was about 74ish Hp and 72ish Torque. Factor in the sportsters extra 40 pounds and extra $2156 price tag over the speedmaster...

6 more Hp and 24 more ft/lbs of torque than my bike out of 413 more cc's (those specs are based on my bikes performance) doesn't seem that impressive.