head to head
Neither is simply harder - they are hard in different places. FIFA Soccer 06 demands more execution; Tecmo Super Bowl demands more reads.

Execution · Competitive PvP
Timing on the ball and outguessing the opposing player's tactics.

Reads · Mind & Math
The classic NES football game where guessing your opponent's play call decides everything.
FIFA Soccer 06 leans Execution (Competitive PvP); Tecmo Super Bowl leans Reads (Mind & Math).
FIFA Soccer 06 leans clearly harder on execution.
FIFA Soccer 06
First-touch control and shot timing decide chances
Tecmo Super Bowl
Simple d-pad jukes, low physical ceiling
Tecmo Super Bowl leans clearly harder on reads.
FIFA Soccer 06
Human opponents vary attack patterns and bait tackles
Tecmo Super Bowl
Versus play-calling is pure pick-the-play mind games
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
FIFA Soccer 06
Bounces and keeper spills inject small randomness
Tecmo Super Bowl
Hidden play selection resolves each snap
Tecmo Super Bowl leans clearly harder on optimization.
FIFA Soccer 06
Squad selection and tactics reward preparation
Tecmo Super Bowl
Roster abuse and playbook tendencies are deeply mapped
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.