Quoted from DazedandConfused:
Since you have both, would you mind saying what you like or don't like about BK vs MB? Which do you find yourself playing more. Thanks.
I have both. I'm selling BK SOR. BK is the first pin that I really stress out playing. The first day I had it home I thought "uh-oh...this feels unpleasant." Which sound ridiculous but it's true. I even switched to the alternate soundtrack because the original fast metal one just adds to my stress (and I love my Metallica pin). It's brutal. It often feels unfair as the main three shots in the middle will often drain.
MB never feels unfair - if it drains, I did it. BK is also waaay faster than MB, which is nice when it's not brutal.