Note: "NSP" refers to Nintendo Switch Package files used for game distribution outside official channels. Discussing or distributing copyrighted games via NSP is illegal and encourages piracy. Below I focus on legal, engaging analysis about Super Mario Odyssey’s quality, mods/homebrew scene, legal digital preservation, and why people search for NSP versions — framed to keep a reader interested while avoiding instructions for piracy.
Only if you have a raw dump of your own cartridge that you haven't converted yet, or if you prefer a 1:1 image of the original media.
If you are running an NSP on a modded Nintendo Switch (Atmosphere CFW), "better" means stable performance and battery life.
Super Mario Odyssey NSP Better: Why NSP is Superior to XCI for Emulation