The two I have now basically sound the same. In fact back when I did a ton of gigging I got rid of my VHT UL and my Sig X because I needed a direct replacement backup and I really wanted to get back to a Marshall sound. Ran the back up on KT77's. I sold that one when I quit playing live but the one from my friend I picked up a couple years ago only difference is just the variances between parts, they are both set relatively close to each other in terms of settings.
Both I have now are bone stock, only thing I've done through the years is replace the tubes. I've had one that was modded with a choke and the NFB for a bit, and I owned the Satch model for a bit. I just prefer the stock ones.
Only thing I do is run the channel volumes high and use the Master to control the overall. Running the master high has zero affect on pushing the tubes harder per Santiago the designer but I had always done that anyway. And my gain was around 11 o'clock, that was it. Cabs at that time were a stock Marshall a slant loaded with 75's and if I was playing local I'd bring my other 4x12 with GB's. Nothing special. I get it though, just didn't work for you and that is all that matters.