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 · Grand Arena
Basketball sim layering shot timing over PvP reads.

Execution · Competitive PvP
Milsim 50v50 team-tactical shooter.
NBA 2K24 leans Execution (Grand Arena); Squad 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.
NBA 2K24
Shot timing, dribble combos, defensive sliding
Squad
Bullet drop, sway, suppression test aim
Squad leans a little harder on reads, though the gap is small.
NBA 2K24
Online PvP requires reading ball handlers
Squad
Squad tactics versus humans demand prediction
NBA 2K24 leans a little harder on variance, though the gap is small.
NBA 2K24
Shot meter and contest RNG
Squad
Minimal RNG, comm-driven outcomes
NBA 2K24 leans a little harder on optimization, though the gap is small.
NBA 2K24
MyTeam builds, badges, MyCareer grinding
Squad
Logistics, FOB placement, kit choice deep
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.