When I sleep at my home in Whiterun, or in a purchased bed at an inn, I get the Well Rested buff.(10% to skill increases)
When I sleep in a bed out in the wilderness I only get a Rested Buff.(5% to skill increases)
When I sleep in either of my beds at the College of Winterhold, the Apprentice Bed OR the Arch-Mage Bed, I only get the Rested Buff.
I would assume that since I own the beds at the college and not the beds in the wilderness, that the buffs from them would be different. What determines which buff I get?