The last time we got a non-answer on the subject of Skyrim on Switch, Skyrim turned out to in fact be coming to Nintendo Switch.
More probably, the answer is that it's somewhere in the middle, with some of the changes from the enhanced edition but some additional changes + tweaks to make the game work well on the Switch hardware.
Without all the enhancements and no mod support (please if anyone thinks THATS going to happen) is it closer to the SE version then or a slightly enhanced original version? People are free to spin it however they want i'm just saying a non-answer like that for a pretty straightforward question rarely turns out marshmallows and rainbows.