I listened to the sound clips available for both makes of mic and thought they sounded almost identical, in reality there is more difference, but it's still a great mic, and factor in the cost it is great value for money,
I have compared the mb 85 beta with a an SM58, and an SM58 beta . in the same PA with the same near flat EQ settings, my opinion is e the MB85 beta is a louder, clearer and warmer than a standard SM58, the SM 58 beta is slightly more beefy in sound , but look at the price difference and there is no contest,l