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.

Reads · Grand Arena
Cold-front sequel; same reads-heavy tactical RTS feel.

Optimization · Grand Arena
Diesel-punk CoH-style RTS with mechs and infantry cover.
Company of Heroes 2 leans Reads (Grand Arena); Iron Harvest leans Optimization (Grand Arena).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Company of Heroes 2
squad micro under pressure
Iron Harvest
squad micro and cover
Company of Heroes 2 leans a little harder on reads, though the gap is small.
Company of Heroes 2
1v1 flanks and feints
Iron Harvest
MP flanks vs humans
Company of Heroes 2 leans a little harder on variance, though the gap is small.
Company of Heroes 2
true sight, fog, weather
Iron Harvest
fog of war
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Company of Heroes 2
commander and build paths solved
Iron Harvest
build orders and unit comps
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.