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
Cops-and-robbers spin on Battlefield built around heists, chases, and urban shootouts.

Execution · Competitive PvP
Shot-timing execution and play-reading against human defensive schemes.
Battlefield Hardline leans Execution (Competitive PvP); NBA 2K18 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.
Battlefield Hardline
Close-quarters gunplay and high-speed vehicle chases
NBA 2K18
Shot timing and stick handles decide possessions
NBA 2K18 leans a little harder on reads, though the gap is small.
Battlefield Hardline
Cops-versus-criminals humans adapt heist tactics
NBA 2K18
Online, baiting defenders and reading schemes is constant
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Battlefield Hardline
Spawns and loot grabs shuffle engagements
NBA 2K18
Shot RNG and physics bounces add measured noise
NBA 2K18 leans a little harder on optimization, though the gap is small.
Battlefield Hardline
Gadget loadouts and mode-specific route knowledge
NBA 2K18
Roster builds, playbooks and matchup hunting reward study
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.