Please help on duplex comps

[Xin Z.]

Hi, this may be an entry level question from a newbie :) I am interested in a full duplex that is located in a very good area. Most of the duplexes in this community seem to be owner occupied, with just a few used as rental. Should I comp the duplex price just like other multifamily properties, i.e. using the rental income and cap rate? Or is it better to comp it like SFR using the sale of price of similar properties?

Thanks so much for any help!