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.

Execution · Grand Arena
A variation-based fighter where character specialisation choices and read-and-punish execution drive competitive outcomes.

Execution · Grand Arena
A 3D fighter where movement and mixup reads decide rounds.
Mortal Kombat X leans Execution (Grand Arena); Tekken 8 leans Execution (Grand Arena).
Tekken 8 leans a little harder on execution, though the gap is small.
Mortal Kombat X
Variation-specific combo routes demand precise practice
Tekken 8
Just-frame inputs and 3D movement punish sloppy hands.
Tekken 8 leans a little harder on reads, though the gap is small.
Mortal Kombat X
Reading opponent's variation choice and tendency shifts the matchup
Tekken 8
Adaptive opponents mix lows, highs, and throws.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Mortal Kombat X
No RNG; transparent match flow
Tekken 8
Negligible RNG in core matches.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mortal Kombat X
Variation selection and optimal punish routes require systematic study
Tekken 8
Frame data, punishes, and movelist depth.
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.