As you can see, the BB compact is larger, pointier, and bulkier than the MAC compact. Also, the numbering of the BB powder is funky. I use the third darkest shade Soft Sand, or number 5. This throws me off because in the foundation range my number is 3.5, Warm Beige. The MAC powder uses the same numbering as the foundation and in both I am an NC25.
Both compacts have a mirror and come with a powder puff.