Hi guys,
As Peter has said there are many differences in spec. But no, it's not just the power.
the 3.0d XF has less power than the S. But it's the word 'portfolio' that's making a difference. This is the highest spec you can get and leaves only a couple of available options - such as ali pedal covers, black suede headlining, those kind of things.
I've got a 2014 (64) XFS Portfolio and I !Removed! love it.