Feature Comparison With Cubase 7?

I have often started music projects in Cubase then moved them over to Nuendo for doing the sound design. No problems.
If you set up some complicated routing in Nuendo, then tried to open it in Cubase it would open just fine, just with simplified routing.
I have never had any problems going back and forth between the programs, if there are features in one that are not in the other, it just opens without those features.