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
Supercell's snappy top-down team brawler built around three-minute objective fights.

Execution · Practiced Mastery
A basketball sim testing shot timing and tactical play against opponents.
Brawl Stars leans Execution (Competitive PvP); NBA 2K3 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.
Brawl Stars
Aim, dodging, and ability timing in real time
NBA 2K3
Shooting and dribble timing decide plays
Brawl Stars leans a little harder on reads, though the gap is small.
Brawl Stars
Human teams rotate, bait supers, and adapt
NBA 2K3
Human opponents reward reading offense and defense
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Brawl Stars
Bush ambushes and power-cube spawns hide information
NBA 2K3
Shot success carries randomness
NBA 2K3 leans a little harder on optimization, though the gap is small.
Brawl Stars
Brawler matchups and map strategy are learnable
NBA 2K3
Playcalling, rotations, and team management reward planning
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.