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 · Competitive PvP
The 2011 reboot that returned Mortal Kombat to brutal 2D fighting fundamentals.

Execution · Competitive PvP
The foundational test of fighting-game execution and human prediction at speed.
Mortal Kombat leans Reads (Competitive PvP); Street Fighter II' Turbo leans Execution (Competitive PvP).
Street Fighter II' Turbo leans a little harder on execution, though the gap is small.
Mortal Kombat
Combo execution and punish timing
Street Fighter II' Turbo
Charge timing and anti-air reactions at turbo speed
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Mortal Kombat
Human opponents adapt; conditioning and counter-guessing rule
Street Fighter II' Turbo
Fireball-trap mind games against an adapting human are the essence
Mortal Kombat leans a little harder on variance, though the gap is small.
Mortal Kombat
Near-deterministic systems
Street Fighter II' Turbo
Twelve public movesets, nothing hidden
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mortal Kombat
Frame data and matchup study converge to known answers
Street Fighter II' Turbo
Matchup theory and spacing fundamentals were codified here
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.