Hi Guys, many thanks for your kind answers, yes the fact that I am male might have been somewhat useful, so I think I will forgo the Skirt option (tee hee) ;-)
2 formal nights, 8 Smart Casual............Wilba.
You would take exactly the same dress for Equinox that you would on RCI; you don't say if you are male or female but basically you would wear the same as you would for any formal cruise night. Check out Celebrity website for details if you are unsure. For men you can hire formal gear on board - tuxedo etc. Details on Celebrity website.
I've been on both, and took the same evening wear, cocktail type dreses, not long dresses for formal nights. On the casual evenings, still wore smart outfits, i.e. trousers, also a nice chiffon skirt I have with smart tops, summer dresses. I never felt out of place, even though some ladies wore full length ballgown type dresses. How they packed them, I have no idea! You will enjoy the Equinox, it is a beautiful ship.