Which suits which group
Four people on one sofa, one Switch. Jamboree. More content, more modes, and headroom if extra people arrive.
Four friends in four houses. Superstars. The online implementation is the reason it exists.
A nostalgic group in their thirties. Superstars. The N64 boards are the entire pitch and they land.
Families with younger players.Either works - both are gentle and luck-heavy - but Jamboree's larger minigame set holds up better over repeat evenings. See games to play with family.
A group that has never played Mario Party. Jamboree, because it is the current one and the one your friends are most likely to already have.
Luck, and why it is the point
Mario Party is deliberately unfair. Stars move, bonus stars are awarded at the end for things nobody was tracking, and a player who did badly all game can win on the final turn. Experienced players find this either the best or the worst thing about the series.
For a mixed group it is genuinely valuable: it means the person who plays a lot does not automatically win, and everybody stays in it until the end. That is the same design logic that makes Mario Kart such a reliable party game, and it is why both outperform technically better games at an actual party. If your group wants skill to decide things, look at Smash Bros. instead.
Controllers and setup
Four players means four controllers, and a Switch ships with two. Both games are playable on a single Joy-Con each, so a spare pair covers a full table - but factor that cost in, because it can approach the price of the game.
Some Mario Party modes use motion controls, which is worth knowing if anyone in the group has limited space or would rather not be waving a controller around after dinner.
Buying advice
Jamboree is the newer game and therefore usually the pricier of the two; Superstars is older and discounts more often. Neither has meaningful in-game purchases, and both are complete in the box. Live prices for both listings sit in the table above and refresh daily - if you are not in a hurry, waiting for a sale on either is a reasonable strategy.
If you are buying it as a present, Jamboree is the safer gift because it is the current release and less likely to already be owned. Our gift guide covers the wider question of what to buy a gamer friend.
The verdict
Jamboree is the better party game and Superstars is the better long-distance game. If your four are in one room, buy Jamboree and enjoy the largest package in the series. If your four are in different houses and all own a Switch, buy Superstars for the online. And if two hours per board sounds like too much, buy neither and read the party hub for shorter alternatives.