Don't quote me wrong. I said revoiced but to my old beaten up ears, they sound more like an EQ/gain/presence tweak. I invite you to go to my youtube channel (link in my signature) I have done them all with everything at noon. No special esoteric mastering. 2 mics straight to audio soundcard. Feel free to comment here on my Youtube page. I haven't watched many videos on the MkII but so many wrong informations being said and brought back in these forums or in my Facebook group. I only see a connector changed. Probably for cost saving as these are mass market high volume amps. But Boss told me that they are the same.