The -Update (v1.0.1) is not just a minor patch—it is a performance enhancer, especially for PC emulation.
Nintendo took a bold risk with the soundtrack, moving away from the generic big-band orchestration of previous titles toward a more synthesized, jazz-fusion, and hip-hop-inspired score.
When you search for "Super Mario Bros. Wonder Switch NSP XCI -Update" , the critical component is the patch. Nintendo released a Day-1 patch to address specific issues in the base game.