I ate fruit from this tree previously and they are good. What makes some types good is primarily rich flavor, low latex, big fruit, one or two seeds only, and resistance to bruising and brown marks in the flesh. I don't know for sure if inca gold is a real name or if this is it. I do know Z4, Z2, Gray and E4 are good named ones worth chasing.T35 from the northern Territory came out high in trials but I haven't seen or tried it. There are other good ones I have seen in markets and on people's trees but there has been no name to go along with them.
I have seen lots of poorer ones as well that are small, seedy, bruise easily, have brown almost water marks in the flesh and are very prone to exuding sticky latex. The best ones are nearly always spherical.