Profibus ndi Profinet onse ndi njira zoyankhulirana zamafakitale, koma amagwiritsa ntchito mitundu yosiyanasiyana ya zingwe. Profibus amagwiritsa ntchito chingwe chamkuwa chopotoka chokhala ndi cholumikizira cha BNC, pomwe Profinet amagwiritsa ntchito chingwe chopindika cha mkuwa kapena fiber-optic yokhala ndi cholumikizira cha RJ45. Mitengo ya data ndi kuthekera kwa mtunda kwa ma protocol awiriwa ndi osiyananso, pomwe Profibus nthawi zambiri amagwiritsidwa ntchito polumikizirana mtunda waufupi ndi Profinet pa mtunda wautali. Kuphatikiza apo, Profinet adapangidwa kuti azigwira ntchito zapamwamba za data komanso maukonde ovuta kuposa Profibus.