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

Optimization · Pure Optimization
Optimizing race mechanics and vortex rituals while executing real-time battle tactics.

Optimization · Practiced Mastery
The original 1994 RTS pitting orc and human bases against each other in Azeroth.
Total War: Warhammer II leans Optimization (Pure Optimization); Warcraft: Orcs & Humans leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Total War: Warhammer II
Unit micro, spell timing, and formation play drive battle outcomes
Warcraft: Orcs & Humans
Clunky unit micro and click speed still matter
Warcraft: Orcs & Humans leans a little harder on reads, though the gap is small.
Total War: Warhammer II
Vortex campaign AI predictable; human opponents require genuine reads
Warcraft: Orcs & Humans
Human multiplayer adds genuine build mind games
Total War: Warhammer II leans a little harder on variance, though the gap is small.
Total War: Warhammer II
Rite costs, random loot drops, and chaos invasion timing create variance
Warcraft: Orcs & Humans
Fog of war hides enemy composition
Total War: Warhammer II leans a little harder on optimization, though the gap is small.
Total War: Warhammer II
Race mechanics and vortex ritual routing are richly optimizable
Warcraft: Orcs & Humans
Build orders and economy timing 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.