The Beuchat computer and F.10 are indeed the same product, just with different brands, and some minor cosmetic differences, but Cressi Edy is entirely different watch, and definitely not from Pelagic Pressure Systems like the other two are. However, although generally the Edy is not too bad, if you are a competitive freediver, and/or frequently train diverse tables, the lack of stop watch at Edy is quite a serious issue. If you have no need for the stop watch, then the Edy is quite attractive - a very durable watch, with exceptionally resistant case and face (even much more expensive models such as the D4 don't offer 200m rating), and a quite long battery time. And it has a rather compact and nice design, so it can be used as a daily watch too.
EDIT: BTW, I admire the lack of imagination at the Beuchat's marketing department. Instead of giving the Pelagic freediving computer a real and a flashy name, they call it "Beuchat Mundial Electronic Depth gauge" - a really an excellent and self-explaining name easy to use in communication rofl