It would be the manual, but with a taller/eco 5th gearset or final drive ratio. Because I know Santa's elves are capable of doing this.
I prefer to shift my own gears, and in my hands the manual's fuel economy will definitely outperform even my most attentive CVT driving abilities in sub/urban driving. (I'm going to write up the results of my comparison this morning.) The highway is still another question... thus the special request for the elves to offer the option to improve the gearing!
For big city dwellers: the clutch action is very light -- it should not be a reason to avoid the manual if you face stop and go driving. It's easy to drive and shift smoothly, and is not going to wear you out.
Having said all that, after driving the CVT, I would definitely NOT send it back if one was left underneath my tree by mistake. But some other economy cars with conventional stepped-gear automatics would drive me mad, and I would send those back.
New Zealanders and Japanese Mirage owners: my experience with the CVT has changed my outlook, and I no longer feel sorry for you, as I used to -- because the CVT is the only transmission available in NZ. (And in Japan.)