I don't know, I like them both about the same. I like the nickname
Georgie, and George-names aren't as common as Chris-names, so probably
Georgiana.
Christiana is uncommon (only met two, one had
Marie as her middle name), but
Christina,
Kristina,
Krystal,
Crystal,
Krista,
Kristen,
Kristin,
Christopher and
Christian were all in the top 100 in the 80s and some of them still are. All similar names seem overused even when they aren't and maybe even a bit dated.