head to head
Alien: Isolation asks more than Mario Party DS, and the gap is optimization.

Variance · Systems & Chaos
A stealth horror where an unpredictable hunter forces hidden-information play.

Variance · Pure Chaos
The shrunken handheld party where touchscreen minigames feed the usual dice-driven chaos.
Alien: Isolation leans Variance (Systems & Chaos); Mario Party DS leans Variance (Pure Chaos).
Mario Party DS leans a little harder on execution, though the gap is small.
Alien: Isolation
Stealth movement, low mechanical bar
Mario Party DS
Touch and mic minigames test handheld dexterity.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Alien: Isolation
Alien has heuristics but doesn't truly model you
Mario Party DS
Hex placement lightly targets rivals.
Mario Party DS leans a little harder on variance, though the gap is small.
Alien: Isolation
Alien's director behavior is hidden and unpredictable
Mario Party DS
Dice and hex RNG dominate the tiny boards.
Alien: Isolation leans clearly harder on optimization.
Alien: Isolation
Resource crafting and route planning help survive
Mario Party DS
Short boards leave little routing depth.
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.