head to head
Pokémon Stadium asks more than Might & Magic: Heroes VI, and the gap is reads.

Optimization · Pure Optimization
A turn-based strategy game where building the optimal army and economy decides victory.

Optimization · Mind & Math
N64 battle sim bringing 3D Pokémon fights and rental-team tournaments to the couch.
Might & Magic: Heroes VI leans Optimization (Pure Optimization); Pokémon Stadium leans Optimization (Mind & Math).
Might & Magic: Heroes VI leans a little harder on execution, though the gap is small.
Might & Magic: Heroes VI
no real-time physical skill needed
Pokémon Stadium
Turn-based selection only
Pokémon Stadium leans clearly harder on reads.
Might & Magic: Heroes VI
predicting human opponent strategy in PvP
Pokémon Stadium
Versus mode against humans rewards prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Might & Magic: Heroes VI
combat rolls and map resources random
Pokémon Stadium
Rental rosters and crit rolls swing matches
Might & Magic: Heroes VI leans a little harder on optimization, though the gap is small.
Might & Magic: Heroes VI
army building and economy near-solvable
Pokémon Stadium
Type theory and rental drafting are studyable
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.