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

Execution · Practiced Mastery
FPS aim welded to a team economy of base-destruction priorities.

Execution · Competitive PvP
On-the-ball flair and one-on-one deception in small-sided street matches.
Command & Conquer: Renegade leans Execution (Practiced Mastery); FIFA Street leans Execution (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Command & Conquer: Renegade
FPS aim in infantry and vehicle fights carries the game
FIFA Street
Flair moves and trick timing decide 4-on-4 duels
FIFA Street leans a little harder on reads, though the gap is small.
Command & Conquer: Renegade
Multiplayer base assaults involve predicting human team pushes
FIFA Street
Beating a human marker is feint-versus-anticipation
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Command & Conquer: Renegade
Maps and economy rules are fully known
FIFA Street
Compact courts keep outcomes deterministic
Command & Conquer: Renegade leans a little harder on optimization, though the gap is small.
Command & Conquer: Renegade
Credit economy and building-target priority decide C&C-mode matches
FIFA Street
Reputation grind and team building are light systems
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.