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

Execution · Competitive PvP
Input execution and human opponent prediction across a two-plane fighting system.

Reads · Competitive PvP
The 2011 reboot that returned Mortal Kombat to brutal 2D fighting fundamentals.
Fatal Fury 3: Road to the Final Victory leans Execution (Competitive PvP); Mortal Kombat leans Reads (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Fatal Fury 3: Road to the Final Victory
Special-move inputs and lane-shift timing demand practiced hands
Mortal Kombat
Combo execution and punish timing
Mortal Kombat leans a little harder on reads, though the gap is small.
Fatal Fury 3: Road to the Final Victory
Versus play is constant prediction of a human's habits
Mortal Kombat
Human opponents adapt; conditioning and counter-guessing rule
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Fatal Fury 3: Road to the Final Victory
Nothing random once matchups are known
Mortal Kombat
Near-deterministic systems
Mortal Kombat leans a little harder on optimization, though the gap is small.
Fatal Fury 3: Road to the Final Victory
Learning frame data and lane mechanics underpins competence
Mortal Kombat
Frame data and matchup study converge to known answers
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.