head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
A turn-based tactics game testing positioning and squad management under RNG.

Optimization · Pure Optimization
Fantasy 4X with strong asymmetric factions and quest paths.
Arma Tactics leans Optimization (Pure Optimization); Endless Legend 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.
Arma Tactics
Turn-based - no twitch demands
Endless Legend
turn-based
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Arma Tactics
Enemy AI scripted; some randomized objectives but no adaptive mind
Endless Legend
scripted AI, limited MP
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Arma Tactics
Hit chance and randomized missions add real randomness
Endless Legend
quest and tech rolls
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Arma Tactics
Positioning, cover and weapon use are the core tactics
Endless Legend
faction-specific yield optimization
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.