^I agree. The musc oil falls somewhere between the EdT and the EdP - it's like the missing link. I think the musc oil is pretty good though - although they added a lot of white musk, they toned down the violets and smoothed out the sharp notes. It's also a bit more feminine than the EdT IMO.
I'm exaggerating here, but in a nut shell, I found the differences to be:
EdT: Violets, concrete and musk
Musc oil: Less violets, same ol' concrete and musk + even more white musk
EdP: Berries, iris and white musk