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
An Xbox football simulation with deep playbook strategy.
NBA 2K14 leans Execution (Competitive PvP); NFL Fever 2004 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
NFL Fever 2004
passing and route timing require precise input
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
NFL Fever 2004
reading human opponent play-calling matters
NFL Fever 2004 leans a little harder on variance, though the gap is small.
NBA 2K14
Shot RNG sways close possessions
NFL Fever 2004
fumbles and injuries add randomness
NFL Fever 2004 leans a little harder on optimization, though the gap is small.
NBA 2K14
Playbook knowledge and roster management reward study
NFL Fever 2004
playbook and roster strategy dominate long-term
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.