As an exclusive update for the Nintendo Switch, Super Mario Bros. Wonder NSP XCI offers several unique features that set it apart from other titles in the series:

The following guide outlines the differences between file formats for Super Mario Bros. Wonder

Players who already own the original can access this exclusive content by purchasing an Upgrade Pack on the Nintendo eShop. Conversely, if a physical Nintendo Switch 2 Edition cartridge is used, the base game remains playable on the original Nintendo Switch hardware, though without the exclusive Switch 2 enhancements. How to Update Super Mario Bros. Wonder | Nintendo Switch

Physical cartridge reviewers discovered that the cartridges shipped with v1.0.0, which had longer loading times between levels. The update reduces load times by approximately 2 seconds per transition. For speedrunners, this is exclusive gold.

The "Live Player" ghosts (shadows of other players online) caused unexpected lag in the base 1.0.0 build. The v1.0.1 update refines netcode, making the —like reviving other players' ghosts and placing standees—significantly smoother.