I do kinda think that the matriarch and the perfourmer do very similar stuff (raw, slightly unstable, quad oscillator synths), so if you’re enjoying the matriarch more, maybe it does make sense to let it lie fallow for a while.
I do think they sound very different with the filters open (and especially with the resonance up). the moog has a very earnest, bright, positive sound while the perfourmer is very somber, serious, and a little punchy, but they definitely have cross over.
mostly I just wish the perfourmer had slightly more patching options (just cv filter cutoff control would be amazing).