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

Execution · Competitive PvP
Tests shot timing and play-calling prediction against human defenders.
Battlefield Hardline leans Execution (Competitive PvP); NBA 2K15 leans Execution (Competitive PvP).
Battlefield Hardline leans a little harder on execution, though the gap is small.
Battlefield Hardline
Close-quarters gunplay and high-speed vehicle chases
NBA 2K15
Shot-stick timing and dribble moves demand practiced hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Battlefield Hardline
Cops-versus-criminals humans adapt heist tactics
NBA 2K15
Versus humans, baiting defenders and calling counters drives possessions
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 2K15
Shot RNG and loose balls swing close games
NBA 2K15 leans a little harder on optimization, though the gap is small.
Battlefield Hardline
Gadget loadouts and mode-specific route knowledge
NBA 2K15
Playbooks, matchups and roster management reward system 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.