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

Optimization · Pure Optimization
A Greek-myth loot ARPG won in the build screen, not the battlefield.

Optimization · Pure Optimization
An auto-attacker where picking the right weapon evolutions wins by itself.
Titan Quest leans Optimization (Pure Optimization); Vampire Survivors leans Optimization (Pure Optimization).
Titan Quest leans a little harder on execution, though the gap is small.
Titan Quest
Click-to-attack combat needs little physical skill
Vampire Survivors
Movement is trivial; no aim or precision required.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Titan Quest
Mythological monsters follow fixed behaviors
Vampire Survivors
Enemies follow fixed spawn scripts; no adaptive opponent.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Titan Quest
Loot drops gate builds behind RNG
Vampire Survivors
Level-up offerings and pickup drops are randomized.
Vampire Survivors leans a little harder on optimization, though the gap is small.
Titan Quest
Mastery combinations and gear math dominate outcomes
Vampire Survivors
Evolution paths and weapon combinations fully solve the run.
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.