Originally Posted by T-Mar

They're all mid-range models and you'd probably find the ride characteristics comparable but if you want to start splitting hairs, then we'd need to know the exact vintage of the other bicycles, and whether the Ironman was a Master or Expert. For instance, the Fuji is Ishiwata 9658 quad butted CrMo but with lower grade CMn forks and stays. The Ironmen were full Tange #1 double butted CrMo and the 912 full double butted CrMo after 1983, with triple butting upgade in 1985 and spline triple butting starting in 1986. The Shimano 105 and 600 groups used on these (except on the 1989 IM Expert) also exhibited various features over the years that could place them slightly below, on par with or above 1986 Sprint.