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 high-execution 3D fighter where reading opponent tendencies and optimising punishment routes defines top play.

Reads · Grand Arena
A neutral-focused fighter where managing the GRD gauge against an adapting opponent creates a constant strategic tug-of-war.
Tekken 7 leans Execution (Grand Arena); Under Night In-Birth II Sys:Celes leans Reads (Grand Arena).
Tekken 7 leans a little harder on execution, though the gap is small.
Tekken 7
Long combo strings and just-frames demand high motor precision
Under Night In-Birth II Sys:Celes
GRD-boosted combos and precise Chain Shift timing demand real execution
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Tekken 7
Reading opponent's defensive tendencies and rage art timing is constant
Under Night In-Birth II Sys:Celes
GRD tug-of-war with a human opponent is persistently adaptive
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Tekken 7
No RNG; all information is visible in the match
Under Night In-Birth II Sys:Celes
No RNG; GRD state is visible information
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Tekken 7
Rage Art/Drive usage, wall carry routes, and frame data heavily studied
Under Night In-Birth II Sys:Celes
GRD management theory and optimal punish routing are well-documented
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.