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

Execution · Competitive PvP
Tests shot timing and faking out human defenders amid item-driven chaos.

Execution · Competitive PvP
Chaotic asymmetric rounds testing aim, facility knowledge and reading untrustworthy humans.
Mario Strikers Charged leans Execution (Competitive PvP); SCP: Secret Laboratory leans Execution (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Strikers Charged
Timing tackles, charged shots and goalie deflections needs quick hands
SCP: Secret Laboratory
Gunfights and SCP chases demand aim and movement
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Strikers Charged
Versus humans, faking shots and baiting tackles drives goals
SCP: Secret Laboratory
Human teams bluff, betray and negotiate constantly
SCP: Secret Laboratory leans a little harder on variance, though the gap is small.
Mario Strikers Charged
Items and stage hazards inject swingy chaos into matches
SCP: Secret Laboratory
Random spawns, items and facility layout each round
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Strikers Charged
Captain abilities and team builds reward knowing the systems
SCP: Secret Laboratory
Class knowledge, keycard routes and zone control reward mastery
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.