Check and make sure that both these machines have shuttles and bobbins. It looks from the pictures like these machines take a long bullet-shuttle that has a long thin bobbin inside it. Also, go online and see what needles each machine takes. Sometimes they take hard-to-find needles.
I'm not familiar with either of these machines, as I collect vintage Singer electrics and have both a White and Singer treadle. I enjoy them all very much. Have fun with this!