Product review (5 stars): Like the Badger and Save Money to Boot.
After reading many reviews of the two primary models of the Insinkerator, I began to realize that the primary "quietness" of the more expensive model was likely due primarily to the sink drain insert that can be bought as an accessory for the considerably cheaper Badger model.

I was replacing an old Sears disposer that was made by Insinkerator and its profile was more narrow just like the Badger's. It appeared to me that my piping layout was not going to allow for the wider profile (larger diameter) of the Evolution (likely due to more sound insulation), so I decided to go with the Badger, save a hundred bucks, and probably wind up with a quieter disposer than I was used to.

I made the right decision:  it fit in the allotted space, it was super smooth, quieter than my old one without the sink drain insert, and SUPER QUIET with the drain insert in place. Score one for me!