They’re different from each other for sure. The closest comparison IMO is that the spite box with no octave blended in sounds a little similar to the curmudgeon with the depth switch on, but even then there’s a slight difference in how they feel when you strike a note
spite box feels like a fuzz, it sags more and doesn’t have the same controlled attack that the curmudgeon can accomplish with the depth switch off. Compared to other fuzzes though, I like the spite box more than the average muff pedal. I would stack a muff with a superfuzz to get those tones before
In short, Curmudgeon = Palm mute chugga chugga, good for verses & reinforcing the girth from your instrument in a mix
Spite box = liquid sustain lead chaos, perfect for fuzz needs & sounding like Sunn O)))
HOWEVER - I think the curmudgeon 2 greatly benefits from being put in a mixer, or boosting the hell out of your amp. With all devices at unity gain, the curmudgeon will cut some sub bass out of your sound similar to playing with a high pass filter. That is the secret sauce to how it stays so clear and defined without overloading.
The depth switch on adds more low end to the input of the circuit, resulting in more total low end, but also can sacrifice the definition of your note attack, so I place it in the DirtFixer or the Bloop and blend in clean lows underneath the tight foundation that the curmudgeon provides