From my experience, Oud Yusha is the sweetest Cambodi that Ensar is offering right now. Encens d' Angkor is in a close second, because it is the same oil, just distilled differently, a darker and more mature Yusha.
Yusuf is also quite sweet, but it has a totally different character and profile than Yusha/Encens. It is more floral and purple, and absolutely wonderful.
But for sweetness, go for Yusha.