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 · Pure Mechanics
Arcade hockey reflexes with light shot-angle guessing against human opponents.

Execution · Competitive PvP
Fast arcade football execution with couch-multiplayer mind games.
Blades of Steel leans Execution (Pure Mechanics); FIFA: Road to World Cup 98 leans Execution (Competitive PvP).
Blades of Steel leans a little harder on execution, though the gap is small.
Blades of Steel
Skating, passing and shot timing decide every rush
FIFA: Road to World Cup 98
Arcade-paced dribbling and shot timing decide matches
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Blades of Steel
Versus a human, goalie duels become guessing games
FIFA: Road to World Cup 98
Couch opponents can be baited; AI cannot
FIFA: Road to World Cup 98 leans a little harder on variance, though the gap is small.
Blades of Steel
Fights and bounces add small arcade chaos
FIFA: Road to World Cup 98
Bouncy ball physics inject classic FIFA luck
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Blades of Steel
Angle exploits on the goalie are quickly mapped
FIFA: Road to World Cup 98
Simple era tactics and exploit goals are quickly 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.