Civic 2011 VTi Pros: If your going to drive it yourself.
Civic 2005 VTi Pros: If your drivers going to drive it.
If the question is about which one of these two is more fuel economic, then both of them are almost equivalent.
The 2011 VTi(1.8L) would give you around 8-9Km/L whereas the 2005 VTi(1.6L) would give you around 9-10Km/L.
Rest I think in any case the 2011 Civic would be the better option!