head to head
Serious Sam: The First Encounter asks more than Lethal Enforcers II: Gun Fighters, and the gap is optimization.

Execution · Pure Mechanics
A light-gun shooter testing raw aiming speed against pop-up targets.

Execution · Pure Mechanics
A loud, high-endurance test of accurate crowd control against relentless scripted enemy swarms in open arenas.
Lethal Enforcers II: Gun Fighters leans Execution (Pure Mechanics); Serious Sam: The First Encounter leans Execution (Pure Mechanics).
Lethal Enforcers II: Gun Fighters leans a little harder on execution, though the gap is small.
Lethal Enforcers II: Gun Fighters
Light-gun aiming speed and accuracy are the whole game
Serious Sam: The First Encounter
Sustained accurate fire against enormous enemy hordes demands constant aim
Lethal Enforcers II: Gun Fighters leans a little harder on reads, though the gap is small.
Lethal Enforcers II: Gun Fighters
Enemies pop in scripted positions, no adaptation
Serious Sam: The First Encounter
All enemies are scripted and follow fixed rush patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Lethal Enforcers II: Gun Fighters
Minor pop-up timing variance, mostly fixed sequences
Serious Sam: The First Encounter
Enemy placement is consistent across runs; no hidden information
Serious Sam: The First Encounter leans clearly harder on optimization.
Lethal Enforcers II: Gun Fighters
Learning shooting-gallery layouts adds modest optimization
Serious Sam: The First Encounter
Enemy priority and positioning strategy are learnable but shallow
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.