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

Execution · Competitive PvP
A chaotic arena fighter built around item combos and stage interaction.

Execution · Competitive PvP
Frantic small-arena duels testing reflexes and prediction of human opponents.
Power Stone 2 leans Execution (Competitive PvP); Superfighters Deluxe 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.
Power Stone 2
fast combo execution and item usage
Superfighters Deluxe
Aim, blocks, throws and movement decide frantic small-arena fights
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Power Stone 2
reading human opponents in free-for-all combat
Superfighters Deluxe
Human opponents constantly adapt positioning and weapon timing
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Power Stone 2
item spawns and stage hazards random
Superfighters Deluxe
Random weapon spawns and destructible chaos shuffle fights
Power Stone 2 leans a little harder on optimization, though the gap is small.
Power Stone 2
item combination knowledge and stage control
Superfighters Deluxe
Map knowledge and weapon priorities are a thin layer
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.