I bought the Randall empty, built it to be low and chugga chugga tight. 2 swamp thangs and 2 Texas heat. 150w 8ohms
Its got this punch through the concrete kind of growl.
The Marshall its bright, breaks up quickly, has a sparkly smooth quality that I have missed. The Randall is perfect for drop tune riffs and sheer volume, the Marshall is so sweet for solos.
Together they sound very complimentary. I need much more time to test it out.