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 · Grand Arena
The genre-defining historical RTS, still alive on the ladder.

Reads · Grand Arena
Grimdark RTS where requisition nodes, squad reinforcement, and chapter counter-picks define competitive depth.
Age of Empires II: Definitive Edition leans Optimization (Grand Arena); Warhammer 40,000: Dawn of War leans Reads (Grand Arena).
Age of Empires II: Definitive Edition leans a little harder on execution, though the gap is small.
Age of Empires II: Definitive Edition
micro and macro APM at high ladder
Warhammer 40,000: Dawn of War
Squad retreat timing and builder unit micro require practiced hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Age of Empires II: Definitive Edition
PvP ladder rewards adaptation
Warhammer 40,000: Dawn of War
Opponent chapter choice and rush timing must be predicted
Warhammer 40,000: Dawn of War leans a little harder on variance, though the gap is small.
Age of Empires II: Definitive Edition
random map spawns minor
Warhammer 40,000: Dawn of War
Relic capture variance and squad reinforcement timing add uncertainty
Age of Empires II: Definitive Edition leans a little harder on optimization, though the gap is small.
Age of Empires II: Definitive Edition
civ build orders deeply mapped
Warhammer 40,000: Dawn of War
Requisition node priority and tech tree builds are well-studied
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.