AppData, seriously? That is one thing that needs to die. I hate it when stuff jams things in AppData.
Anyway, MO2 portable is simpler. Copy over your Mo2 folder. Install or copy over Skyrim. (If installing new, slap SKSE in there.) Done.
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MO2 portable even remembers all your apps and things you set up. Like DYNDOLOD, SSEDIT, Bodyslide, etc.
Of course in the end it's what you're used to. But MO2 is absolutely superior to ... anything else actually. I haven't encountered anything better yet. It's not perfect by any means but certainly better than other mod managers.
Some of it's issues are.... not always displaying proper load order. Sometimes it won't work with script extenders (had this occur in FO4 actually), and some other issues. But even for smaller mod load orders like in BG3 it is a HUGE headache remover. Some of those BG3 mods really clutter the game folder.