SF6 is infinitely better than SFV. 5 was so bad it was unplayable to me, and the times I tried to get back into it I just couldn't. SF6 hit the ground running and hasn't looked back. Much more fun, much better mechanics, overall superior and it's still early. SF6 can definitely have some outrageous comebacks though, some characters especially in Final Round than others (Cough, Marisa, Cough).
All that said, it does have a couple of massive outliers like a braindead corner game that is always heavy disadvantage if you're in it, characters with busted Drive Rush, shady inputs, stuff like that. But hopefully these get addressed in a near-future patch.
The more expensive version will give you the Season 1 pass with the game. It has the 4 DLC characters (Rashid, Aki (new character), Ed, and Akuma, I think in that order), extra costumes, bonus points for avatar customization, stuff like that.
7000+ for SF6 wow lol. I don't even know what to say. Just wow. Gonna be a historic event.