I misspoke, yes, I meant by giving them a headphones for Jack. Which one sounds better?

I'm interested in buying a portable DAC. I saw the Mi5 Fiio at first but was not convinced because it could not be used with Spotify on the mobile. Now I'm between the Fiio BTR5 and the BTR3K Which of these two is better? My priority is sound quality with bluetooth headphones, I previously...