White Headphones vs Black Headphones

I own both the white and black headphones. The black are great but the sound out of the white ones is distinctly worse than the black, to the point of being almost unusable. I also notice that the white phones use Bluetooth LE while the black phones are standard non-LE Bluetooth.

Is there a way to change the white set from LE to normal?

Wow, did you ever solve this or at least get confirmation that they have different hardware specs between the colors?