They are both exactly the same, Select is just a rebrand of Amazon. Don't buy Select unless it is cheaper. And yes they work fine, have the Evo Plus 512.
I was at the same spot once and wondered where the difference actually is, as there is a rather big price difference sometimes. When I searched, I found rather quickly that this is indeed just rebranded, and it was even confirmed by a Samsung support person.
Amazon is the only seller of the Select cards. For the Plus, anyone can be a seller, so there could be fakes being sold as well. If the Plus is being sold directly by Amazon, then yes, it should be a legit card and there should be no difference.