Hi RLG. I think if I were lucky enough to be travelling in CW, I think I would pick the UD every time.It's quieter for a start. You don't get so many people marching past your seats, (including us!), as there is a toilet front and rear. Also I think 2 seats together for a couple travelling together on the UD is fine, as you are almost facing each other to talk, instead of turning your head to talk. Just my observations... Enjoy your trip...