In practice, I've found that the fuel economy between my 2013 Focus and my dad's 2011 Corolla to be quite different, particularly in the highway, and especially in the winter.
The lifetime average of the Focus is around 8.0 l/100 km, mostly city, and 7.3 l/100 km for the Corolla. Of course the Corolla has nearly 80000 km on it now, and the focus 20 000. Both are 5 speed manuals.
Hatch vs Sedan though.