Bluetooth Wireless vs. Regular Old Wireless

I am in the market to purchase some wireless headphones I can connect to my audio system so I can do my cardio while listening to tunes and not disturb anyone else in the room.

My question is, which sounds better a Bluetooth wireless rig or a regular old wireless rig? Honestly, I'm not even sure there is a difference...but want to punt the question out to my expert compadres here on Audiogon!