Speedball has a lower BB (~10mm), longer CS’s, shorter reach and a high front (certainly with the truss fork)
This translates to a more planted, stable feel, less twitchy, strong and stable (sorry) at higher speeds, more upright, central, comfortable riding position
With 29+ tyres it wants to roll fast, and whips up quick
A well sorted riding bike, and quite different to the Mk1 & 2 which I have spent time on
I haven’t had all that much time on the Speedball, but plan to have an extended ride the weekend