I have both and they both sound similar when compared to other high gain modules.
Side by side with just them, they sound pretty different and I’m not one for describing what I hear.
The deliverance sounds rounder, fatter if that makes any sense.
I own 11 synergy modules and have owned bunches and bunches of others. The two Fryette’s are the most flexible of any, ever, too much almost. They aren’t like the slo which is just simple and sounds great. The fryettes take some work and cover a lot of gain.
They do cleaner and mid-gain very well too. If there was only space for one, I would say deliverance because it can do an awesome clean also. If you needed to start at around a hiwatt gain level, the pitbull would be the choice. The pitbull has more gain, but they cover similar mid ground.