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

Execution · Pure Mechanics
A loud, high-endurance test of accurate crowd control against relentless scripted enemy swarms in open arenas.

Execution · Pure Mechanics
A rail-shooter endurance test of target tracking against memorised enemy waves.
Serious Sam: The First Encounter leans Execution (Pure Mechanics); T2: The Arcade Game leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Serious Sam: The First Encounter
Sustained accurate fire against enormous enemy hordes demands constant aim
T2: The Arcade Game
Tracking dozens of targets with cursor speed is everything
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Serious Sam: The First Encounter
All enemies are scripted and follow fixed rush patterns
T2: The Arcade Game
Waves are choreographed, nothing adapts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Serious Sam: The First Encounter
Enemy placement is consistent across runs; no hidden information
T2: The Arcade Game
Spawn details blur slightly but patterns dominate
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Serious Sam: The First Encounter
Enemy priority and positioning strategy are learnable but shallow
T2: The Arcade Game
Learning wave order and powerup spots stretches credits
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.