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 · Practiced Mastery
The original 2003 WWII shooter built around cinematic squad set pieces.

Execution · Pure Mechanics
A multi-sport execution game testing trick timing and line selection across open mountain terrain.
Call of Duty leans Execution (Practiced Mastery); Riders Republic leans Execution (Pure Mechanics).
Riders Republic leans a little harder on execution, though the gap is small.
Call of Duty
Aim and reaction carry the scripted firefights
Riders Republic
Trick execution and landing timing across multiple sports disciplines
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty
Light multiplayer prediction; campaign AI is scripted
Riders Republic
Mass-start races add limited human prediction layer
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty
Some spawn and hit unpredictability
Riders Republic
Terrain variation and collision chaos in crowd events
Call of Duty leans a little harder on optimization, though the gap is small.
Call of Duty
Memorising set pieces and weapon positions
Riders Republic
Route selection and equipment progression have learnable optimal paths
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.