To a casual Street Fighter fan like me, it looks virtually indistinguishable other than the 2 palette swaps and the unplayable new mode.
Is this not an accurate statement? Looks like they removed some online features, ability to play original Super Turbo, and added some new characters/balance changes/Hado minigame. But it's still the same base game it looks like.
What separates it are that just about all of the changes made to the characters in HD Remix are gone, but others changes/balances have been made in their place, and there's some game play additions like teching (getting out of) throws. It also has a completely different soundtrack, voice actors from SF4 and SF5, and you can unlock titles to use online like in recent SFs as well.
And if you're not playing as him, you will hate Violent Ken so much. XD