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

Execution · Competitive PvP
Shot timing and play selection against opponents adjusting to your tendencies.

Execution · Practiced Mastery
A basketball sim balancing input timing, opponent reads, and team management.
NBA 2K14 leans Execution (Competitive PvP); NBA 2K7 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.
NBA 2K14
Shot release timing and dribble chains gate scoring
NBA 2K7
Stick controls for shooting and dribbling demand timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
NBA 2K14
Online opponents counter your favourite plays
NBA 2K7
Human opponents online require reading offense and defense
NBA 2K7 leans a little harder on variance, though the gap is small.
NBA 2K14
Shot RNG sways close possessions
NBA 2K7
Shot percentages and physics add real-game randomness
NBA 2K7 leans a little harder on optimization, though the gap is small.
NBA 2K14
Playbook knowledge and roster management reward study
NBA 2K7
Roster management, play-calling and franchise economy run 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.