To go on a bit about DOF.
If you use the same lens and use the same focus distance then the DOF will be smaller on APS-C then FF, this has to do with the Circle of Confusion.
Basically you need to enlarge the APS-C more so things are a bit more critical.
But this bogus comparison because you will use 50mm lens differently on APS-C then on FF and so the focus distance will be different and you will get smaller DOF with FF because of that.
I tried to explain in another thread how a different mount could help APS-C in this regards by making faster lenses posiable but lets not go into that