head to head
Neither is simply harder - they are hard in different places. Pokemon Black Version 2 demands more reads; The Elder Scrolls V: Skyrim demands more execution.

Optimization · Pure Optimization
The direct Unova sequel with an expanded Pokedex, Pokemon World Tournament, and the toughest Gen 5 content.

Optimization · Pure Optimization
An open-world RPG mostly about discovering and stacking exploitable progression systems.
Pokemon Black Version 2 leans Optimization (Pure Optimization); The Elder Scrolls V: Skyrim leans Optimization (Pure Optimization).
The Elder Scrolls V: Skyrim leans clearly harder on execution.
Pokemon Black Version 2
Turn-based; nothing for the hands
The Elder Scrolls V: Skyrim
Combat is forgiving; aim and timing rarely punish you.
Pokemon Black Version 2 leans clearly harder on reads.
Pokemon Black Version 2
Campaign foes are scripted; competitive PvP optional
The Elder Scrolls V: Skyrim
Enemy AI is scripted and exploitable; not adaptive.
Pokemon Black Version 2 leans a little harder on variance, though the gap is small.
Pokemon Black Version 2
Encounter and catch RNG plus hidden IVs
The Elder Scrolls V: Skyrim
Loot tables and leveled lists inject mild randomness.
Pokemon Black Version 2 leans a little harder on optimization, though the gap is small.
Pokemon Black Version 2
Deep team building, EV training, and matchup mastery
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.