head to head
Mario Party asks more than UNO, and the gap is execution.

Variance · Pure Chaos
The original board-game party romp where dice and Chance Time happily overrule whoever played best.

Variance · Pure Chaos
The classic shedding card game where the deck, not the player, usually decides.
Mario Party leans Variance (Pure Chaos); UNO leans Variance (Pure Chaos).
Mario Party leans clearly harder on execution.
Mario Party
Stick-rotating and button minigames test hands briefly.
UNO
Playing a card requires no dexterity
UNO leans a little harder on reads, though the gap is small.
Mario Party
Mild rivalry calls in versus minigames.
UNO
Mild bluffing about held colors and wilds
UNO leans a little harder on variance, though the gap is small.
Mario Party
Dice rolls and chance time decide most boards.
UNO
Hidden hands and the draw pile decide most games
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Party
Star routing gives a thin strategic layer.
UNO
Basic card-retention strategy caps out quickly
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.