Hi,
Good question, I will try to answer it.
They're both culinary terms for describing how to prepare food but there is a big difference between the two.
Bakken is when you use an open (frying) pan with a constant medium temperature to cook fish, meat, vegetables, etc.
Braden, most likely (but not necessarily) used when preparing meat, is very quickly roasting the food from the outside on a high temperature, and then let it sit with a cover on a low temperature until it's done.