head to head
Street Fighter X Tekken asks more than Starhawk, and the gap is reads.

Execution · Practiced Mastery
Tests shooter mechanics fused with real-time base-building economy against human teams.

Execution · Grand Arena
A tag-team crossover fighter pitting Street Fighter's cast against Tekken's under Capcom rules.
Starhawk leans Execution (Practiced Mastery); Street Fighter X Tekken leans Execution (Grand Arena).
Street Fighter X Tekken leans a little harder on execution, though the gap is small.
Starhawk
Vehicle dogfights and third-person gunplay demand twitch skill
Street Fighter X Tekken
Tag combos and juggle timing demand practiced hands
Street Fighter X Tekken leans clearly harder on reads.
Starhawk
Predicting enemy build placement and pushes matters online
Street Fighter X Tekken
Human mixups and tag baits require adaptation
Starhawk leans a little harder on variance, though the gap is small.
Starhawk
Little hidden beyond fog of incoming drops
Street Fighter X Tekken
Deterministic aside from negligible elements
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Starhawk
Rift economy and build-and-battle structure placement decide matches
Street Fighter X Tekken
Gem loadouts and team synergy add a builder layer
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.