While I do not have Massive Mike nor Musclebound Mike, I must admit that they do look like great products, just can't comment since I haven't used them, but I have Boris and must say he is fantastic. And the huge collection of faces and morphs included is overwhelming, all with MAT Pose files to keep it simple and easy. He poses and animates perfectly, and brings morphs and MAT Poses for the Bodysuit from mike's Clothing Pack 2 giving you a few more options right out of the box. I highly recommend him.