TFU states in the Dark Side ending that Starkiller was equal to Darth Vader in power. Equal, not superior. Vader was weaker than Yoda, Luke was equal to Vader, Obi Wan was weakest of them all (but still extremely powerful and skilled). EDIT: And the Emperor was the strongest of all of them.
...looks like you got me.
Here I would point out the obvious flaw made by writers in that statement (which was clearly made so as to not overshadow Vader) and that, in theory, this still does not disprove the idea that there is such power in The Force, but merely disproves Starkiller's case. But that piece of lore pretty much breaks my argument.
...and I'll point out that I mostly meant gameplay in my original statement (though I stand by my arguments). Compared to clicking a button and seeing Revan Force Push some mook, it's far more tactile to push yourself, in any direction.
Edit! Something I just thought of: in the beginning of TFU, you play as Vader...and he's doing all of the top-level moves that Starkiller can do by the end of the game (in my opinion, a pretty great way to tease the player with high level abilities). So one could claim that Vader DID have these powers...