head to head
Neither is simply harder - they are hard in different places. Shin Megami Tensei IV demands more variance; The Elder Scrolls V: Skyrim demands more execution.

Optimization · Pure Optimization
Handheld SMT where smirk RNG stings but fusion planning and weakness knowledge carry you.

Optimization · Pure Optimization
An open-world RPG mostly about discovering and stacking exploitable progression systems.
Shin Megami Tensei IV leans Optimization (Pure Optimization); The Elder Scrolls V: Skyrim leans Optimization (Pure Optimization).
The Elder Scrolls V: Skyrim leans clearly harder on execution.
Shin Megami Tensei IV
Menu combat with no execution ceiling.
The Elder Scrolls V: Skyrim
Combat is forgiving; aim and timing rarely punish you.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Shin Megami Tensei IV
Demon negotiation is random personality scripts.
The Elder Scrolls V: Skyrim
Enemy AI is scripted and exploitable; not adaptive.
Shin Megami Tensei IV leans clearly harder on variance.
Shin Megami Tensei IV
Smirk procs and negotiation RNG swing fights hard.
The Elder Scrolls V: Skyrim
Loot tables and leveled lists inject mild randomness.
Shin Megami Tensei IV leans clearly harder on optimization.
Shin Megami Tensei IV
Fusion apps, weakness charts, and builds solve the game.
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.