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

Execution · Competitive PvP
The pioneering large-scale WWII shooter built on combined-arms map chaos.
Execution · Practiced Mastery
A handheld arcade-style international soccer game.
Battlefield 1942 leans Execution (Competitive PvP); ISS Advance leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Battlefield 1942
Aim, vehicle handling, and leading shots matter.
ISS Advance
passing and shooting timing
Battlefield 1942 leans a little harder on reads, though the gap is small.
Battlefield 1942
Human teams adapt flanks and vehicle pushes.
ISS Advance
human opponents allow light prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Battlefield 1942
64-player chaos and spawns add noise.
ISS Advance
match outcome randomness
ISS Advance leans a little harder on optimization, though the gap is small.
Battlefield 1942
Map control and vehicle timing learnable.
ISS Advance
tactics and team management
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.