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

Optimization · Pure Optimization
A post-nuclear RPG expanded in scope where tagged builds and Gifted-trait optimization dominate.

Optimization · Pure Optimization
A breezy dungeon-crawling loot game about builds and ever-better randomized gear.
Fallout 2 leans Optimization (Pure Optimization); Torchlight leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout 2
Turn-based AP system makes twitch entirely irrelevant
Torchlight
Click-to-kill combat with minimal mechanical demand
Fallout 2 leans a little harder on reads, though the gap is small.
Fallout 2
All tribal and Enclave enemies run fixed scripted combat routines
Torchlight
Solo dungeon crawl, no adaptive opposition
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout 2
Hidden special encounters and timed events create significant unknown-information space
Torchlight
Randomized loot and dungeon layouts gate power
Fallout 2 leans a little harder on optimization, though the gap is small.
Fallout 2
SPECIAL and skill tagging with Gifted trait produce well-known dominant build strategies
Torchlight
Build paths and gear stats are the real game
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.