head to head
Fallout 2 asks more than The Elder Scrolls V: Skyrim, and the gap is variance.

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

Optimization · Pure Optimization
An open-world RPG mostly about discovering and stacking exploitable progression systems.
Fallout 2 leans Optimization (Pure Optimization); The Elder Scrolls V: Skyrim leans Optimization (Pure Optimization).
The Elder Scrolls V: Skyrim leans a little harder on execution, though the gap is small.
Fallout 2
Turn-based AP system makes twitch entirely irrelevant
The Elder Scrolls V: Skyrim
Combat is forgiving; aim and timing rarely punish you.
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
The Elder Scrolls V: Skyrim
Enemy AI is scripted and exploitable; not adaptive.
Fallout 2 leans clearly harder on variance.
Fallout 2
Hidden special encounters and timed events create significant unknown-information space
The Elder Scrolls V: Skyrim
Loot tables and leveled lists inject mild randomness.
Fallout 2 leans clearly harder on optimization.
Fallout 2
SPECIAL and skill tagging with Gifted trait produce well-known dominant build strategies
The Elder Scrolls V: Skyrim
Skill stacking, enchant loops, and exploits are deeply solvable.
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.