head to head
Warcraft III: Reign of Chaos asks more than Warhammer 40,000: Dawn of War III, and the gap is optimization.

Optimization · Grand Arena
Blizzard's hero-centric RTS where build-order theory meets surgical unit micro against humans.

Execution · Grand Arena
Elite-focused 40K RTS where power node pressure and ability-chain timing test both micro and opponent reading.
Warcraft III: Reign of Chaos leans Optimization (Grand Arena); Warhammer 40,000: Dawn of War III leans Execution (Grand Arena).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Warcraft III: Reign of Chaos
Micro of heroes and units decides fights
Warhammer 40,000: Dawn of War III
Elite ability chains and walker micro have strict timing demands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Warcraft III: Reign of Chaos
Scouting and out-guessing a human opponent's tech
Warhammer 40,000: Dawn of War III
Three-race elite compositions must be scouted and countered
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Warcraft III: Reign of Chaos
Creep routes and item drops add randomness
Warhammer 40,000: Dawn of War III
Power node variance and ability cooldown RNG add moderate uncertainty
Warcraft III: Reign of Chaos leans clearly harder on optimization.
Warcraft III: Reign of Chaos
Build orders, creeping routes, and matchup theory run deep
Warhammer 40,000: Dawn of War III
Elite point allocation and doctrine selection are defined optimization problems
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.