So I think it kind of depends on:
1) What type jewelry piece you're going to have the stone in?
If you're going to have it in an earring, then I would go for moissanite, in case it falls out or gets lost, at least you won't feel "as bad". lol
A necklace or a ring is a little more secure.
2) Where are you going to wear your piece?
If you are going to bring this piece traveling, then I'd go with moissante as well, in case it gets lost or stolen, again, you won't feel "as bad".
I prefer to not wear my diamonds when I travel (exception is probably my wedding and engagement ring, when I go to visit family internationally). And I like moissante as a great travel choice for jewelry.
3) And whether you care if other people can tell if it is a moissanite or diamond?
While moissanites and diamonds look very similar, they do have some
slight differences.
Moissanites are known for their beautiful sparkle. Their refractory properties are even greater than diamonds, so depending on the cut and clarity, they can shine more brilliantly than diamonds.
The color of a diamond shine is actually different than a moissanite. Diamond color is more colorless. While, moissanite color, when it sparkles, tends to have a bit of the rainbow in it.
Also, the
bigger the moissanite size, the
more obvious that rainbow color will show through in the sparkle.
Just a few things to consider.
Either way, both beautiful stones!