There is no comparison to a Norsat 3220 LNB mounted on a quality feedhorn with the appropriate scalar. If you go with the LNB, are you wanting to receive both polarities? If you want both polarities, are you buying an orthomode type feedhorn with 2 Norsat 3220 LNBs or a feedhorn with servo controlled polarity control? If servo polarity selection, what device will control the servo positioning?
With that said, since you are mounting on a generic offset dish without manufacturer matching feedhorn/scalar, I personally would go the less expensive route and install the C-band LNBF/conical scalar combo.