That's it really. Which do you prefer? I've abandoned the quest for seasonal names (DD2 due late Dec) and just gone with two names I love- Xanthe and Thea. With the middle names, Joy would be for my grandmother and Adelphie has significance as DD2 is a longed for and unexpected sister for DD1. While I like both middle names, I don't think they mix and match with the first names. So I don't really like Thea Joy, iyswim.
Mellen having had DD1's name shortened through school etc to something I don't particularly like, one of the reasons I like both Xanthe and Thea is that they're quite short and sweet and won't necessarily automatically be reduced by everyone to a single nn- famous last words!