Alicka, I was glad to see that you are posting again. :-)
I do not have a bottle of Sun in my arsenal.
Due to some reason, it did not impress me enough to invest into a full bottle after sniffing while I remember it being a happy and relaxed fragrance. Citrucy top probably made me think that it is a happy-go-lucky summer morning juice, although there is more to it than just it. The middle (heliotrope?) in it reminded me of Emporio Armani (gold), and the drydown -- dry sun burnt skin without any sun screen applied, slightly musky-ambery -- evoked some memories of another kind. :-) Waffles? Scones? There is something slow and gourmet, warm and sensual about Sun, for sure. Something along the lines of Sensi, Red Door and even #4, although I realize these are a totally different concept!!! Michael Edwards places Sun as similar to Bal a Versailles, Boucheron, L'Heure Bleue and Parfum Sacre, well, not similar, but in the sense "if you like Sun, you might like...".
If I were you and absolutely in love with Sun, I would wear it during cooler months and in different environments and see how it behaves. If it does not work, although I do not see any reasons why it should not, your option is to do more sniffing! Good luck.