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

Execution · Practiced Mastery
Tests arcade sports timing in a licensed fantasy sport with swingy Snitch catches.

Execution · Competitive PvP
Accessible large-scale shooting with light prediction against human players.
Harry Potter: Quidditch World Cup leans Execution (Practiced Mastery); Star Wars Battlefront leans Execution (Competitive PvP).
Star Wars Battlefront leans a little harder on execution, though the gap is small.
Harry Potter: Quidditch World Cup
Timing passes, tackles and Snitch chases needs moderate dexterity
Star Wars Battlefront
Aimbot dominates blaster fights despite generous hitboxes
Star Wars Battlefront leans a little harder on reads, though the gap is small.
Harry Potter: Quidditch World Cup
Versus a friend, faking plays adds light prediction
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.
Harry Potter: Quidditch World Cup
Snitch appearances and combo opportunities add swing
Star Wars Battlefront
Power-up pickups and spawn flow inject chaos
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Harry Potter: Quidditch World Cup
Special move charging and team choice reward system knowledge
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.