I agree with this.
I mean the fact it has the tag element alone changes things. You didn't have Capcom players go, oh we can't play Marvel 3 and SF4 at the same time. If SFxTK wasn't awful I'm sure people would have still played it.
But anyway on topic:
Big differences between TTTT and T7:
- tag (this is huge)
- bound system changes (this too since a lot of combos went bye bye as a result)
- character roster / balance
- sidestepping / movement change
- Tekken 7's new stuff like the crappy rage arts, and the armor moves (well they have armor effect sparks now), also you cannot forget about the really dumb slow motion dramatic effect bullshit thing
The only counter argument I see people throwing out is that both are Tekken. Which is silly and uniformed.