head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

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

Optimization · Practiced Mastery
Planning guerilla engagements against patrolling machines with component weak points.
Borderlands leans Optimization (Practiced Mastery); Generation Zero 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
Generation Zero
Aiming at weak points and repositioning needs steady hands
Generation Zero leans a little harder on reads, though the gap is small.
Borderlands
Bandits and skags are scripted
Generation Zero
Machines follow sensor-driven routines, not adaptive modelling
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
Generation Zero
Patrol positions and loot are unknown until scouted
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
Generation Zero
Loadout building and guerilla engagement planning carry fights
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.