What's the difference? Is it loading times, because if it is how do you force digital to download to console and not on SD (1. My SD Card is low on space, and 2. Just in case of it being faster I want the fastest version.) Is the only way to force it to install is removing the SD card, and if it is will it damage the switch in any way? I've also noticed SD has 1.0 runs and as far as I'm aware the only way you can get 1.0 digital is with hacks, so is this a term for someone hacking their version to 1.0? I just want to know just in case if I buy the game physically.

You can force the game to download to the console by not having an SD cart inserted when you download it and this is what you should do if you want the fastest version of the game. It will load slower on an SD card as opposed to being installed directly in the switch memory, although both of those options are faster than a physical cartridge. SD was for people who got 1.0 with hacks, which doesn't really have relevance anymore.