We like the differences and the similarities between Celebrity and RC. Even Princess. I'll echo the huge + for Celebrity that there is no inside smoking. So if you are a nonsmoker you'll enjoy that. My only suggestion is book a Celebrity cruise and judge for yourself. Others experiences, opinions, likes and dislikes maynot be yours.
With RC we only cruise the Freedom Class, Voyager Class and Radiance Class ships.
With Celebrity we cruise the three different class of ships. M Class, S Class and E Class ships.