Specs below is from redbook (which i always take to be pretty accurate).
Looks like CVT is more efficient for city driving, on the paper. my weekly mileage is around 6.4L so that's pretty much on the dot.

VTI-S CVT
Fuel Consumption City 6L/100km
Fuel Consumption Highway 5.2L/100km

VTI-S Manual
Fuel Consumption City 6.4L/100km
Fuel Consumption Highway 5.2L/100km