The reason I see more of the Sabino pattern in this mare, than frame, is because of the high white going up the fronts of the back legs & the "speckled" look to her markings, as well as the roaning. Frames (with no other patterns present) have dark legs...not white. (picture the Clydesdales)
But as I said before, it's very possible she could carry both Sabino & Frame.