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

Optimization · Pure Optimization
A maze-building tower defense about optimizing tower placement against scripted enemy waves.

Optimization · Pure Optimization
An open-world RPG mostly about discovering and stacking exploitable progression systems.
Fieldrunners 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.
Fieldrunners 2
Placing towers - no twitch dimension
The Elder Scrolls V: Skyrim
Combat is forgiving; aim and timing rarely punish you.
Fieldrunners 2 leans a little harder on reads, though the gap is small.
Fieldrunners 2
Enemies follow fixed paths, not adaptation
The Elder Scrolls V: Skyrim
Enemy AI is scripted and exploitable; not adaptive.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Fieldrunners 2
Wave composition scripted-but-unknown first time
The Elder Scrolls V: Skyrim
Loot tables and leveled lists inject mild randomness.
Fieldrunners 2 leans clearly harder on optimization.
Fieldrunners 2
Maze layouts and tower mixes are the solvable puzzle
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.