I was going to post some comments after I played it a week ago.
I would recommend you not to buy it if you already have SCPT2. If you don't have SCPT2, then buy it instead of this RG edition.
I only played it like half an hour but found it extremely boring as I played SCPT2 a good 10 times or so (reaching no.1, max stats to level 50 and won all the tournments etc) and the gameply, layout are exactly the same. Just with another outfit for SCPT2.
In fact you don't get all four GS in the Tour mode. Just RG. Even less 'Tier 1' tournements too.
Haven't play the exhibition mode but I guess it's the same players as SCPT2.
Really don't waste your hard earn bucks on this edition. I rather get the WTATour old game.
However, as I said, I only played it for 1/2 hour so someone can correct me if I missed anything new.