Do you think the Hapi is superior due to its advanced hardware or its ability to produce more accurate measurements?Yes.
Yes.
Also, think DM7 sounded better than Motu but not that big a difference.
Also own an Exasound E38 which I thought was better than Motu, but on par with the DM7, but all of these DACs are relatively close as far as I'm concerned.
Hapi is first DAC I've owned where I thought it really distinguished itself over and above the others. Of course, just my opinion.