2. what is the difference between Maxi Broil and Econo Broil for baking?
Well, for openers, those settings are not for baking. They're for... well, you know.
As far as KitchenAid electric ovens are concerned, the Maxi Broil turns on all the top heating elements, while the Econo Broil only turns on the middle one of the (presumably) three. Use it for something that doesn't require full heat/power or is small enough to fit easily in the center of the oven where you don't need heat coming down from the entire top of the oven..
I've seen the KA electric ovens criticized for not having powerful enough top heating elements, though I think mine has been adequate over the years. It
won't do to a steak what a grill will do, so that's why I use the grill unless it's raining pitchforks or the grill is snowed in. I have been known to shovel my way out to the grill when I
really need to use it.
Mike