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 forgiving brawler-platformer where hijacking the right monster is the only decision.

Execution · Pure Mechanics
A by-the-numbers cover shooter testing only modest aim.
Crash of the Titans leans Execution (Practiced Mastery); Eat Lead: The Return of Matt Hazard leans Execution (Pure Mechanics).
Eat Lead: The Return of Matt Hazard leans a little harder on execution, though the gap is small.
Crash of the Titans
Combo brawling and titan-jacking need light timing
Eat Lead: The Return of Matt Hazard
Cover-shooter aim with generous margins
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Crash of the Titans
Titans are scripted mounts, not minds
Eat Lead: The Return of Matt Hazard
Parody enemies follow obviously scripted waves
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Crash of the Titans
Levels are linear and fixed
Eat Lead: The Return of Matt Hazard
Set pieces never change
Crash of the Titans leans a little harder on optimization, though the gap is small.
Crash of the Titans
Choosing which titan to ride is shallow strategy
Eat Lead: The Return of Matt Hazard
Little to solve beyond weapon pickups
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.