head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

Optimization · Pure Optimization
A maze-building tower defense about optimizing tower placement against scripted enemy waves.

Optimization · Pure Optimization
Grand strategy wargame mixing turn-based empire play with real-time battles.
Fieldrunners 2 leans Optimization (Pure Optimization); Medieval II: Total War leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Fieldrunners 2
Placing towers - no twitch dimension
Medieval II: Total War
real-time battle micro is modest
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Fieldrunners 2
Enemies follow fixed paths, not adaptation
Medieval II: Total War
campaign AI is exploitable and mappable
Medieval II: Total War leans a little harder on variance, though the gap is small.
Fieldrunners 2
Wave composition scripted-but-unknown first time
Medieval II: Total War
fog of war and event triggers hide some state
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Fieldrunners 2
Maze layouts and tower mixes are the solvable puzzle
Medieval II: Total War
economy, unit counters, and campaign map strategy dominate
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.