Pretty much. I have a mix of both:

Those are Front Rank in the foreground and a mix of FR and Copplestone GOS (now NS 1672) in the background.
The FR figures are a little bit bigger and chunkier than the Copplestone figures (yes, they are huge!) but not so that you'd notice. I am one of those pernickety types who won't mix incompatible figures by size, and I'm happy with these alongside each other. They're not a perfect match, but close enough

Hope helpful.