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.

Optimization · Pure Optimization
The co-op sequel where two players engineer overlapping trap gauntlets against orc waves.

Optimization · Practiced Mastery
Time-manipulation puzzles meet the series' signature weapon-upgrade gunplay.
Orcs Must Die! 2 leans Optimization (Pure Optimization); Ratchet & Clank: A Crack in Time leans Optimization (Practiced Mastery).
Ratchet & Clank: A Crack in Time leans a little harder on execution, though the gap is small.
Orcs Must Die! 2
Co-op shooting and trap triggering
Ratchet & Clank: A Crack in Time
Hoverboot movement, aiming, and time-puzzle dexterity.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Orcs Must Die! 2
Scripted wave pathing
Ratchet & Clank: A Crack in Time
Entirely scripted single-player content.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Orcs Must Die! 2
Endless mode shuffles compositions slightly
Ratchet & Clank: A Crack in Time
First-pass unknowns in puzzles and arenas.
Orcs Must Die! 2 leans a little harder on optimization, though the gap is small.
Orcs Must Die! 2
Upgrade spirit economy and trap synergies dominate
Ratchet & Clank: A Crack in Time
Clank's time puzzles and weapon economy are solvable 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.