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.

Optimization · Practiced Mastery
Twin-stick co-op shooter precursor.

Optimization · Practiced Mastery
Fantasy looter shooter with class hybrids.
Helldivers leans Optimization (Practiced Mastery); Tiny Tina's Wonderlands leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Helldivers
Twin-stick aim and stratagem inputs
Tiny Tina's Wonderlands
Gunplay similar to Borderlands 3
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Helldivers
Scripted enemies, no real reads
Tiny Tina's Wonderlands
Scripted fantasy enemies, no reads
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Helldivers
Random spawns and patrol pressure
Tiny Tina's Wonderlands
Loot rolls and Chaos Chamber RNG
Tiny Tina's Wonderlands leans a little harder on optimization, though the gap is small.
Helldivers
Loadout combos and stratagem chains
Tiny Tina's Wonderlands
Dual classes and spell builds deep
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.