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

Optimization · Pure Optimization
Stacking multi-class abilities and CT tricks to dominate tactically scripted encounters.
Fallout 2 leans Optimization (Pure Optimization); Fell Seal: Arbiter's Mark 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
Fell Seal: Arbiter's Mark
Turn-based; no timing windows whatsoever
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout 2
All tribal and Enclave enemies run fixed scripted combat routines
Fell Seal: Arbiter's Mark
Enemy AI is scripted; fixed job archetypes behave predictably
Fallout 2 leans a little harder on variance, though the gap is small.
Fallout 2
Hidden special encounters and timed events create significant unknown-information space
Fell Seal: Arbiter's Mark
Random encounters and loot add mild variance; counter procs are minor
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout 2
SPECIAL and skill tagging with Gifted trait produce well-known dominant build strategies
Fell Seal: Arbiter's Mark
Multi-class ability transfers and CT manipulation make this near-FFT optimization depth
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.