head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Pure Mechanics
The sequel that built console online multiplayer around ranked Battle Rifle duels.

Execution · Competitive PvP
A beloved movement shooter pairing an execution-heavy campaign with adaptive pilot duels.
Halo 2 leans Execution (Pure Mechanics); Titanfall 2 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.
Halo 2
BR precision and movement tricks online
Titanfall 2
Slide-hopping and aim under speed set a high ceiling
Titanfall 2 leans a little harder on reads, though the gap is small.
Halo 2
Ranked duels hinge on outplaying humans
Titanfall 2
Multiplayer pilots out-position and out-guess each other
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Halo 2
Matchmaking opponents and spawns vary
Titanfall 2
Flank uncertainty and titanfall timing only
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Halo 2
Map control, timers, and weapon spawns
Titanfall 2
Campaign gauntlets and loadout synergies are 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.