The newer Floyd Rose II is exactly like a Schaller Floyd, same design..
The Floyd Rose Pro is a low profile Floyd, similar to a lot of the licensed ones on the market.. It's hardened steel, like an OFR, and is 'stiff' feeling like one too.. Stays in tune very well though..
Here's a picture of a Pro, from my Jackson Mutant:
They're pretty nice, with rounded tops on the saddles, but I still prefer an Edge/LoPro..
Fender owns the Floyd Rose name now, so they're all gonna have Fender on the box.. Just don't confuse them with the "Fender Floyd", this model is for a standard strat, and is shaped like a regular strat bidge w/no fine tuners.. Stick with the 'Original', 'II', or 'Pro' models..
I'm not sure if the Pro will fit in a TRS rout, the rout on the guitar above was for a copy of a Schaller floyd.. It's a small bridge so it might fit..
As to the other questions here, I would stay clear of some of the Licensed floyds, like the WD one.. These aren't much better than a TRS, some of them could be the same bridge.. Look at the url for the unknown trem, the 'Product Code' is 'TRSPRO', that should say it all..
The Gotoh bridge, on the other hand, is a very good trem, lots of similarities to an Edge(I remember someone mentioning that Gotoh manufactures the Edge/LoPro, not sure).. It not exactly the same though, it doesn't have the knife inserts, or the extra-thick base plate
Also, remember that the prices on WD's site are list price, most stores discount off of this.. That's why a $180 bridge on WD's site is $96 from Musiciansfriend..
Depends on what will fit the rout, because if you're gonna rout it, might as well get an Edge..