Phoebus was a mishap that asus created that's why its not in the comparison. Also the same reason why it's is EOL early. It's general a big step back from the original STX and ST when asus created the Phoebus with it's badly dowe software suite. Diamond thought it be a fun idea to make a budget card using a similar chip with the same exact software suite the phoebus came with. I had to give the diamond card away as I couldn't sell it do to the phoebus style software suite. Both ZXR and STX II even the original STX/ST is the better card. It's down to which has the features that you want, because both have swap able op-amp's which let you change the sound signature of the cards.