YES better than Hannah, YES better than Chloe. If you like those names, use Hanna, Hania, Hanne, Hendel, Annabel, etc., and for Chloe: Chiara, Calliope, Chloris, Cecily, etc.
However, there are so many prettier names related to/similar to Julia, like: Giulia, Iuile, Jillian, Juliana, Jilia, Jolie, Julienne, Juliet/Juliette/Julietta, Juliska, Juliya, Uliana, Joella/Joelle, Yulia/Yuliya, Julitta, Julian/Juliane, July, Juniper, Juvela, and Julija. I think one of these would be much prettier than the over-used Julia or Julie.