The XCI is a 5.6 GB raw cart dump. The NSP (base) is similar but strips unused padding. Neither is “better” for gameplay—performance is identical if properly installed . The key difference comes with updates and DLC.
: Ensure the update NSP matches the region of your base NSP or XCI. Installing an update from a different region may result in the game not recognizing the patch. super mario odyssey switch nsp xci update fix
This is the classic or missing update requirement. The XCI is a 5