Well, I'm not good at describing scents, and you described so specifically but...
Laeliiocatarthron Winter Fantasy smells like roses
Oncidium Tsiku Marguerite is scented a little sweetly I'd say
Iwan. Apple Blossom is scented too, but I don't remember what it smells like!
Sorry. A lot of other people here have Apple Blossoms, so probably someone else can describe it.