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

Variance · Systems & Chaos
Polished match-three sequel layering specialty modes onto the gem-swapping formula.

Optimization · Systems & Chaos
Racing the day cycle to stack items faster than the seed punishes you.
Bejeweled 3 leans Variance (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.
Bejeweled 3
Quick swaps matter in Lightning mode
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.
Bejeweled 3
No opponent in any mode
Muck
Enemies swarm on simple scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Bejeweled 3
Random drops drive cascades and badge luck
Muck
Seeds, chest rolls and item drops shape every run
Muck leans a little harder on optimization, though the gap is small.
Bejeweled 3
Special-gem setups and mode-specific strategies
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.