Hey, man.
The Friedman have a bigger range of tonality. Not only because of the second channel, but the EQ range. If you set all EQ at noon Marshall will sound much more brighter. But you can get the same tonality in Friedman by tweaking the EQ. Even in most bright settings in the Marshall you can cover that with Friedman. But you can go much more dark in Friedman and can’t with Marshall.