The Breeze is a single chip, the Nobsound is a dual-chip. The layout is similar, so one can find the SMD resistors in both cases. Removing them is easy, re-soldering is a bit trickier, but I did it even with my weak soldering skills.
I have both and done the gain mod on both, which dropped the noise floor and thus improved the sound quality.
That said, if you're going to buy a boxed device, I'd recommend going for the FXAudio FX502SPro which I have and has significantly better sound than the Breeze or Nobsound or the Volt+D which people here rave about.