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

Optimization · Practiced Mastery
The original loot-driven co-op shooter set on the bandit world of Pandora.

Optimization · Practiced Mastery
Fighting and building at insect scale by learning fixed creature patterns and optimising gear choices.
Borderlands leans Optimization (Practiced Mastery); Grounded leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Borderlands
Standard FPS aim; numbers matter more than precision
Grounded
Bug combat demands precise dodge timing and weapon choice
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Borderlands
Bandits and skags are scripted
Grounded
Insect AI is scripted; no adaptive opponent
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Borderlands
Procedural loot drops gate your power
Grounded
Creature spawn and loot drops carry session-level randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Borderlands
Builds, gear math, and farming routes dominate
Grounded
Base placement, gear progression, and creature weaknesses are 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.