So “my nafka mina” between potatoes and peanuts?! ”
Very simple diff, they are totally two diff shailos:
Peanuts – I recall , is if it is included in the ‘min’ of Kitniyos and thus included in the very original Gezero of the Gaonim…
Whereas, potatoes – everyone agrees that its a “min” on its own, the only issue is that “potentially” it can produce flour and should come under a new ban, but after all it was never included in the very original ban.