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
A third-person tower defense about funneling orc hordes into gleefully lethal trap corridors.

Optimization · Pure Optimization
A base-building survival game where you pilot a mech, automate defenses, and hold off alien swarms on a hostile planet.
Orcs Must Die! leans Optimization (Pure Optimization); The Riftbreaker leans Optimization (Pure Optimization).
The Riftbreaker leans a little harder on execution, though the gap is small.
Orcs Must Die!
Active shooting supplements the traps
The Riftbreaker
Mech combat against swarms needs active hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Orcs Must Die!
Orc waves follow fixed paths
The Riftbreaker
Alien waves are programmatic, not adaptive
The Riftbreaker leans a little harder on variance, though the gap is small.
Orcs Must Die!
Minor wave composition randomness
The Riftbreaker
Wave timing and map resources add some unknowns
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Orcs Must Die!
Trap placement and kill-corridor economics are the game
The Riftbreaker
Base layout, tech tree, and defenses dominate survival
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.