The CF2W trounces the M100 in OVERALL quality sound. Take them as the same model, a wired, and the CF2W is far more versatile. Tighter bass, more forward mids, sparkly treble, Can shine on any genre. The m100 with their recessed mids more subdued treble, and boomy bass catered yo a very specific audience. I loved my M100, but my taste in music grew, and I didn't like carrying 2 pairs of headphones everywhere for when I decided to switch genres. As a wired model, CF2W is V-Moda best model to date. Regarding Bluetooth, it's OK, but as they stated it wasn't their focus. Unfortunate for primarily wireless users, but I picked the CF2W over the 99 Classic. Both have great low end and mids. Both have clear treble, but the CF2W is a little less fatiguing. Still very clear though. Hip hop to classical, these cans can and do shine. Awesome upgrade.