The Jubilee has far more gain than a JCM800 series. It has a lower frequency point for the midrange and can be darker amd way thicker. Put the Jubilee on Clean channel with rhythm clip on and put the gain up. Add lots of presence and treble and it is similar to an SC20. Similar. Not the same granted. What is "better" is up to the user. Are ypu happy with the Jubilee? Do you run the gain high on the Lead channel? If so, the SC20 won't be the same at all without an OD pedal. What are you after?