head to head
Splatoon 2 asks more than Superfighters Deluxe, and the gap is optimization.

Execution · Practiced Mastery
A team shooter where aim and positioning against human opponents controls the map.

Execution · Competitive PvP
Frantic small-arena duels testing reflexes and prediction of human opponents.
Splatoon 2 leans Execution (Practiced Mastery); 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.
Splatoon 2
aim and movement decide ink battles
Superfighters Deluxe
Aim, blocks, throws and movement decide frantic small-arena fights
Superfighters Deluxe leans a little harder on reads, though the gap is small.
Splatoon 2
predicting human opponent positioning
Superfighters Deluxe
Human opponents constantly adapt positioning and weapon timing
Superfighters Deluxe leans a little harder on variance, though the gap is small.
Splatoon 2
weapon and map rotation randomness
Superfighters Deluxe
Random weapon spawns and destructible chaos shuffle fights
Splatoon 2 leans clearly harder on optimization.
Splatoon 2
loadout and turf strategy solvable
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.