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.

Execution · Pure Mechanics
An explosively destructible run-and-gun starring parody action-movie heroes.

Execution · Pure Mechanics
A fast-paced shoot-em-up testing aim and reload management against enemy waves.
Broforce leans Execution (Pure Mechanics); Let Them Come leans Execution (Pure Mechanics).
Let Them Come leans a little harder on execution, though the gap is small.
Broforce
Run-and-gun reflexes amid constant explosions
Let Them Come
Twitch aiming and reload timing dominate survival
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Broforce
Enemies are dumb scripts
Let Them Come
Enemy waves are scripted, not adaptive
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Broforce
Random bro assignments and destructible chaos shake runs
Let Them Come
Wave composition and spawns vary somewhat
Let Them Come leans a little harder on optimization, though the gap is small.
Broforce
Knowing each bro's kit and level layouts helps
Let Them Come
Weapon upgrades and resource choices extend runs
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.