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 · Practiced Mastery
A brawler that tests combo execution and crowd management across linear gauntlets, with a light optimisation layer from its RPG progression.

Execution · Practiced Mastery
FPS aim welded to a team economy of base-destruction priorities.
Castle Crashers leans Execution (Practiced Mastery); Command & Conquer: Renegade 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.
Castle Crashers
Combo execution and crowd-control timing are the performance ceiling
Command & Conquer: Renegade
FPS aim in infantry and vehicle fights carries the game
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Castle Crashers
PvP arenas add light human-opponent reads
Command & Conquer: Renegade
Multiplayer base assaults involve predicting human team pushes
Castle Crashers leans a little harder on variance, though the gap is small.
Castle Crashers
Enemy spawns follow scripted patterns with minimal randomness
Command & Conquer: Renegade
Maps and economy rules are fully known
Castle Crashers leans a little harder on optimization, though the gap is small.
Castle Crashers
Levelling investment, magic loadout, and pet choice are optimisable
Command & Conquer: Renegade
Credit economy and building-target priority decide C&C-mode matches
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.