In the context of software distribution for the Nintendo Switch, the title is commonly discussed regarding its file architecture: NSP (Nintendo Submission Package) and XCI (NX Cartridge Image). These formats represent the digital and physical cartridge dumps of the software, respectively.
Ultimately, the keyword EA SPORTS FC 24 Switch NSP XCI -Update- -eShop- represents a technical user who understands the anatomy of the Nintendo Switch. The game itself is a decent football port—playable, finally on Frostbite, but not next-gen. Whether you download the signature from Nintendo’s servers (eShop) or a backup file (NSP/XCI), the beautiful game runs the same.
A: Updates are almost always NSP. An "XCI update" is a misnomer; that would be a repackaged cartridge, which is rare and risky.
