The Butcher is supposedly the JSX50, which was dumped at production time.
The Butcher is said to have a half power switch but no 6550's like the JSX50 was going to have.
It also has the 5 position rotary preamp voicing/attack dial that the JSX50 had.
I really want to try one, if I like it I can buy one and then throw 6L6's in my JSX120.