head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Reads · Grand Arena
A controlled-pace fighter where resource management and opponent modelling outweigh raw execution pressure.

Execution · Grand Arena
A tag-team crossover fighter pitting Street Fighter's cast against Tekken's under Capcom rules.
Mortal Kombat 11 leans Reads (Grand Arena); Street Fighter X Tekken leans Execution (Grand Arena).
Street Fighter X Tekken leans a little harder on execution, though the gap is small.
Mortal Kombat 11
Kustom variation execution is demanding but more accessible than MKX
Street Fighter X Tekken
Tag combos and juggle timing demand practiced hands
Mortal Kombat 11 leans a little harder on reads, though the gap is small.
Mortal Kombat 11
Fatal Blow timing reads and opponent tendency tracking are constant
Street Fighter X Tekken
Human mixups and tag baits require adaptation
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Mortal Kombat 11
No RNG; all mechanics are visible
Street Fighter X Tekken
Deterministic aside from negligible elements
Mortal Kombat 11 leans a little harder on optimization, though the gap is small.
Mortal Kombat 11
Fatal Blow baiting, Kustom build selection, and frame data extensively studied
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.