Yep that is the sound. Of course the YJM has significant more gain (if you want it) then the Metro does. I had a 100 watt Metro non master volume (1969 build) and it was almost impossible to get the most out of that amp without driving the amp. Of course this would kill small animals and make you deaf. The powerscaling on a 1959 platform is what makes the YJM amp so attractive along with all the options for gain. 50 watt 100 watt, jumpered or not, engagded boost.... decisions decisions.
Oh and I plan to use two KT66's and two EL34s with the idea being that the amp will be using a KT66 powerstage in the 50 watt mode.