When it comes to multi-family townhouses, it’s typical that the owner’s floors look a whole lot more desirable than the units that will be listed for rent. Not so at this Boerum Hill townhouse at 355 Pacific Street. The house has undergone a renovation resulting in two very lovely duplex apartments. Picking favorites is going to be a lot harder than the new owner might expect. For the whole 3,440-square-foot property, it’s asking $4.595 million.