head to head
Borderlands 2 asks more than Pokémon Mystery Dungeon: Red Rescue Team, and the gap is execution.

Optimization · Systems & Chaos
Loot-shooter RPG built on gear chasing.

Variance · Systems & Chaos
Turn-based resource management through randomly generated dungeon layouts.
Borderlands 2 leans Optimization (Systems & Chaos); Pokémon Mystery Dungeon: Red Rescue Team leans Variance (Systems & Chaos).
Borderlands 2 leans clearly harder on execution.
Borderlands 2
Aim matters but generous hit feel
Pokémon Mystery Dungeon: Red Rescue Team
Turn-based grid movement - no twitch demands
Borderlands 2 leans a little harder on reads, though the gap is small.
Borderlands 2
Enemies are scripted loot fodder
Pokémon Mystery Dungeon: Red Rescue Team
Wild Pokémon follow simple deterministic AI
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Borderlands 2
Procedurally generated weapon drops vary
Pokémon Mystery Dungeon: Red Rescue Team
Random dungeon layouts, items and encounters each run
Borderlands 2 leans clearly harder on optimization.
Borderlands 2
Skill trees and gear math heavily solved
Pokémon Mystery Dungeon: Red Rescue Team
Team building, item management and type matchups carry runs
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.