head to head
Grey Goo asks more than Team Fortress 2, and the gap is optimization.

Reads · Grand Arena
Three-faction sci-fi RTS where asymmetric Goo mechanics and unit counter-selection drive competitive outcomes.

Execution · Competitive PvP
Class-based team shooter with deep mind games.
Grey Goo leans Reads (Grand Arena); Team Fortress 2 leans Execution (Competitive PvP).
Team Fortress 2 leans a little harder on execution, though the gap is small.
Grey Goo
Goo expansion rate timing and unit special abilities need precise control
Team Fortress 2
Projectile aim and rocket jumps reward hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Grey Goo
Three-faction asymmetry makes opponent tech choices hard to predict
Team Fortress 2
Spy/sniper duels are pure prediction
Team Fortress 2 leans a little harder on variance, though the gap is small.
Grey Goo
Map resource spread is fixed; minimal in-game RNG
Team Fortress 2
Random crits and spread inject RNG
Grey Goo leans clearly harder on optimization.
Grey Goo
Goo creep routing and tech order are well-defined optimization problems
Team Fortress 2
Class loadouts and map routes solvable
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.