head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Competitive PvP
The original class-based capture-the-flag shooter built on Quake movement.

Execution · Competitive PvP
A movement-first multiplayer shooter where parkour aim duels decide fights.
Team Fortress Classic leans Execution (Competitive PvP); Titanfall leans Execution (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Team Fortress Classic
Conc jumps, rocket aim, grenade timing demand sharp hands
Titanfall
Wall-running gunfights demand elite aim and movement
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Team Fortress Classic
Human defenders adapt chokes and offense routes constantly
Titanfall
Human pilots adapt positioning and titan timing against you
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Team Fortress Classic
Open maps, little hidden information beyond flanks
Titanfall
Some uncertainty in titan drops and flanks
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Team Fortress Classic
Class picks and map routes are learnable but shallow
Titanfall
Loadouts and titan timing are a thin solvable layer
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.