I know the front part of the suit looks different for both with and without the
vest, but there are differences in the rear part of the suit.
P.S. I'm really sorry but I couldn't upload screenshots.
As CXN2615 suggested, it would be great if you could pick the ghillie suit you wanted. Actually, the ghillie suits that somebody found in the game files ( http://www.armaholic.com/page.php?id=19744 ) were in multiple camos.