Its a bit confusing, are the ss20 & ss11B essentially the same? on the AMT site they compare the ss20 to the (older lower gain) ss11 by saying..... ((( "the SS-20 is the more aggressive “METAL” pedal."))) Ok thats fine, so the ss20 is their highgain metal pedal. Which leads us to the ss11B, where they say.... ((( "The SS-11B Modern version is designed to cover the sounds of today’s high gain tube amplifiers. the SS-11B is a rock-metal monster!" ))) So BOTH are AMT' answer to a "metal" pedal. So do they share the same base tone and each pedal simply has different features? Or do they sound different? And how?