Just got @shotgunshane's free Carbo-i that no one claimed, here's an initial assessment: Build: The Tenore cables are a knotty piece of overcooked spaghetti compared to the new ones. It's no contest: the Tenore broke all the time and new ones seem decent, flat cable tho. Comfort: I don't like the straight cable entry much, but otherwise pretty similar. The smallish housings are easy to fit. Sensitivity: About 11dB higher than the Tenore. Stock tips: Stiff POS, impossible to get a good seal for me. Subjectively: Better bass-to-mid balance and resolution on the new ones. Lower treble hot and distorted, kinda lo-fi at times. Highs more present but not as smooth, better ambient cues tho. Overall dunno, need more head time. Measurement rig: UMIK-1 with a makeshift latex coupler, around 25mm long and ~6mm inner diameter. Uncompensated measurements: Green: Tenore Yellow: Carbo-i Left channel @ same output level: Matched @ 500Hz: Observations: The new ones resonate @ 6 KHz on my rig, this peak will move around depending on insertion depth. Some people will be more bothered than others. 2.5KHz too hot for me on both models, I usually EQ this down ~4dB on the Tenore, new ones will possibly require mods.