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 · Practiced Mastery
A team arcade racer with no finish line, scoring takedowns and objectives in a rolling stampede.

Execution · Competitive PvP
Accessible large-scale shooting with light prediction against human players.
Onrush leans Execution (Practiced Mastery); Star Wars Battlefront 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.
Onrush
Boost management and aerial takedowns need car control
Star Wars Battlefront
Aimbot dominates blaster fights despite generous hitboxes
Star Wars Battlefront leans a little harder on reads, though the gap is small.
Onrush
Team-based human opponents in stampede modes
Star Wars Battlefront
Human lobbies add modest positional prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Onrush
Chaotic pack collisions and fodder spawns
Star Wars Battlefront
Power-up pickups and spawn flow inject chaos
Onrush leans a little harder on optimization, though the gap is small.
Onrush
Class roles and rush timing are learnable
Star Wars Battlefront
Objective timing and pickup control reward learned routes
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.