Used 5DM1 vs 50D

No offense but what portrait photographer wants facial details such as pores to show up in their photos? I showed you a photo of her with no PP done? Do you consider pimples and pores to be details worth salvaging?

Of course any photo can be done by any camera but there's always compromises and always a choice for a certain camera/format over another.

I find crop to have best value.

Most portrait photographers have their own style anyways. I prefer my models skin to show no imperfections and look smooth as silk without looking plasticy (I think that I pull it off well enough) while making their eyes pop.