head to head
Warcraft III: Reign of Chaos asks more than Tekken Tag Tournament, and the gap is variance.

Execution · Grand Arena
A tag-team 3D fighter layering team optimization onto Tekken's execution and reads core.

Optimization · Grand Arena
Blizzard's hero-centric RTS where build-order theory meets surgical unit micro against humans.
Tekken Tag Tournament leans Execution (Grand Arena); Warcraft III: Reign of Chaos leans Optimization (Grand Arena).
Tekken Tag Tournament leans a little harder on execution, though the gap is small.
Tekken Tag Tournament
Tag combos and netsu juggles demand precise inputs
Warcraft III: Reign of Chaos
Micro of heroes and units decides fights
Tekken Tag Tournament leans a little harder on reads, though the gap is small.
Tekken Tag Tournament
Tag timing adds another layer of human mind-games
Warcraft III: Reign of Chaos
Scouting and out-guessing a human opponent's tech
Warcraft III: Reign of Chaos leans clearly harder on variance.
Tekken Tag Tournament
Open information; nothing hidden between rounds
Warcraft III: Reign of Chaos
Creep routes and item drops add randomness
Warcraft III: Reign of Chaos leans clearly harder on optimization.
Tekken Tag Tournament
Team synergy and tag combo routing are optimizable systems
Warcraft III: Reign of Chaos
Build orders, creeping routes, and matchup theory run deep
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.