I do know that in An Annoying Winter:Chapter One (story by Mcklauster—art by KerosineCannibal) the main character briefly talks about breeds based on the artists name (Carpdime, SchafferArak and Wolfram Sparks) but doesn’t go into much detail about their differences.
While the distinction both behavioural and physical is very useful in crossover stories as it explains the differences in head cannon I’ve never seen it outside of booperino’s comic about owning a ShafferAraks because fuck you.
Though you are more than welcome to try! However I would try and follow what the creators cannon is in terms of behaviour
Personally I do see them as different breeds though I just find it too much effort to write them in as useful as differently behaving fluffies might be for a story