Gents,
I find that, generally, Dragon (DML) figures tend to be slightly smaller in stature than SST. However the uniforms are highly interchangable. I have 'bashed' Great War figures using DML and SST kit and other companies.
As SST seem to have lost interest, in their wonderful 'Bayonets...' series I am forced to look elsewhere for uniform and equipment - some times my DIY skills (or lack of) are required.
ACW fans can get suitable kit, there is an etailer, in the US, selling high quality uni. and other gear. If SST were to issue 'carded uniform and parts' we would not need to look elsewhere.
pm me for a link.
Old Bill