I know the feeling
I know the feeling very, very well. Even when I try out an amp that is quite good, as soon as I try to compare it to my dino, any comparison is laughable.
I've had this experience with a couple of Friedman's and ENGLs.
Jack Frost is a killer musician, but the mantis I tried was very loose and just didn't have "it."
Maybe it's much better with a boost?