Both are identical in terms of being flavorless IMO.
The biggest point of distinction comes in the aspect of consistency of product (safety).
Strictly anecdotal evidence, but I got two samples of NN, and one was slightly low in nic content (mg), and the other was well over. Both were supposed to be 100mg. (I did not titrate either sample, but one seriously made my head spin -and was confirmed by another, and the other batch had to use a fair bit more to get the "normal effect") Hardly scientific I admit. But I trust what my body tells me.
Given the length of time, and issues that Nude has had in delivering consistent product, it's simply not worth the risk when we have a vendor like @Nicotine_River providing consistent, first class product, in a safe and timely manner.
Good luck in your hunt though!
Tried nic select, and the consistency was as expected, and no coloration of the mixes (WRT taste).
Edit: check Google for nude Nicotine problems. You'll find a ton of folks with problematic experiences over the last year (almost two) when dealing with NN. I'm not just an isolated incident!