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
A linear western shooter testing aim and learned encounter pacing through scripted set pieces.

Execution · Pure Mechanics
A twin-stick mech shooter testing aiming and dodging through enemy waves.
Call of Juarez: Bound In Blood leans Execution (Practiced Mastery); Gatling Gears leans Execution (Pure Mechanics).
Gatling Gears leans a little harder on execution, though the gap is small.
Call of Juarez: Bound In Blood
Aimbot would trivialise the gunfights and showdown duels
Gatling Gears
Twin-stick aiming and dodging under fire dominate
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Juarez: Bound In Blood
Scripted campaign enemies; thin multiplayer adds little prediction
Gatling Gears
Enemy waves are scripted, not adaptive
Gatling Gears leans a little harder on variance, though the gap is small.
Call of Juarez: Bound In Blood
Encounter layouts are unknown on first run, then fixed
Gatling Gears
Enemy spawns and drops add mild chaos
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Juarez: Bound In Blood
Cover routes and concentration-mode usage are learnable patterns
Gatling Gears
Weapon upgrades and positioning reward planning
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.