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 combo system built on constant Combo Breaker mind-games that create a unique adaptive read-off at every moment of a combo.

Reads · Grand Arena
A reads-heavy neutral game where V-System decisions and opponent modelling decide bouts.
Killer Instinct (2013) leans Execution (Grand Arena); Street Fighter V leans Reads (Grand Arena).
Killer Instinct (2013) leans a little harder on execution, though the gap is small.
Killer Instinct (2013)
Shadow counters and Combo Breaker timing demand very precise inputs
Street Fighter V
V-Trigger combos and meaty setups require solid execution
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Killer Instinct (2013)
Combo Breaker prediction is a pure read-off against an adaptive opponent
Street Fighter V
V-System neutral game heavily rewards opponent habit exploitation
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Killer Instinct (2013)
No RNG; all mechanics are fully visible
Street Fighter V
No RNG; match flow is entirely player-driven
Killer Instinct (2013) leans a little harder on optimization, though the gap is small.
Killer Instinct (2013)
Instinct activation timing and optimal opener routes are well-studied
Street Fighter V
Season-by-season tier lists and V-Skill routing reward study
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.