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

Optimization · Systems & Chaos
A survivors-like testing build synergy stacking against randomised upgrade offers.

Optimization · Systems & Chaos
Racing the day cycle to stack items faster than the seed punishes you.
Megabonk leans Optimization (Systems & Chaos); Muck leans Optimization (Systems & Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Megabonk
Dodging dense hordes takes positioning but not twitch aim
Muck
Kiting bosses and dodging demands basic action skill
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Megabonk
Hordes mindlessly converge on you
Muck
Enemies swarm on simple scripts
Megabonk leans a little harder on variance, though the gap is small.
Megabonk
Item and upgrade rolls shape every run's build
Muck
Seeds, chest rolls and item drops shape every run
Megabonk leans a little harder on optimization, though the gap is small.
Megabonk
Stacking synergistic upgrades into broken builds is the loop
Muck
Power-stacking economy and day-loop routing decide survival
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.