I like both of them but not enough to use.
Selina sometimes looks misspelled to me, I think I would do Selena or Celina.
Selene is cute but I think Céline might be easier somehow because with Selene some people say seh-leen and some seh-lee-nee (which is sort of nice and sort of too close to salami at the same time).
Please rate my list:
https://www.behindthename.com/pnl/6232