Even just the difference when saving out the .pof from pcs2 can be drastic - it obviously doesn't have to generate the collision detection data from the high detail model in lod0 if you use the $nocollide_this_only flag... Nice.
Still waiting for a working collada version of PCS2 - I have a build that works, for some reason the latest stable release has something wrong with it, doesn't recognise multiple materials on an object (the previous, unstable release works - just crashes after saving out a .pof - I'm not complaining though, it's still better than using truespace!!!)