head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
The 2002 Total War pairing turn-based medieval empire management with massive real-time battles.

Optimization · Pure Optimization
Hybrid game fusing party-based RPG questing with full RTS base building and sector economies.
Medieval: Total War leans Optimization (Pure Optimization); SpellForce 3 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.
Medieval: Total War
Real-time battle control rewards quick unit handling
SpellForce 3
RTS base control plus hero micro at moderate pace
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Medieval: Total War
Multiplayer battles add human feints; campaign AI is scripted
SpellForce 3
Skirmish PvP exists but is a small scene
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Medieval: Total War
Battle dice, loyalty and event cards add noise
SpellForce 3
Loot drops and map events in RPG sections
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Medieval: Total War
Campaign economy and battlefield doctrine are deeply learnable
SpellForce 3
Hero builds, sector economy, and army composition 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.