I just replaced my iPhone 6 Plus with a Samsung Galaxy S7, and the difference in quality so far with one song (Killswitch Engage - We Carry On) is noticable. I still have my iPad Air 2, so I can go back and forth between the two. Both devices suffer at higher volume, but it's more apparent on the S7. I figure that a BT headphone with aptX support will sound better with the S7 than the CFWs do. I have an old LG Tone sitting around somewhere, but it may not be fair to compare due to the over-ear/in-ear difference, and age of the Tones (they might be BT v2.1 at best).
I bought the CFW fully knowing that these were geared towards iOS devices, so I'm not angry and am not complaining. I can always sell these off and pick up something else, though they're fine wired & I enjoy them with the AudioQuest Dragonfly 1.2 DAC. I like the idea of a headphone that's both Bluetooth and wired. Over the fall and winter, all I had to do was pull the cord from the computer, switch on BT, and leave the office. With warmer weather approaching, I'll probably rely more on in-ears and sport models due to heat and sweat. But because of how hard it is to find a good pair of 3-button wired Android headphones, I might need to mainly use Bluetooth.