Hello everyone! I bought myself a Penrose, I also have a Mobius. I have had Mobius in operation for more than a year, handled them very carefully and now they are in excellent condition. First of all, when I took Penrose out of the box, I compared the mounts, in Penrose they have stiffening ribs, which should have a positive effect on durability. The sound of both is very similar, maybe in some places the Mobius sound better. The microphone from Penrose on Mobius gives simply excellent quality, but average quality on Penros. Also on the Penrose speakers there is an additional mesh on the speakers.
I apologize for my English, I used google translate.
Audeze do warn in their FAQ that when using headset bluetooth/wireless that they've prioritised the headphone/headset audio bitrate over the microphone bitrate. They advise to use Aux for better MIC quality and that is probably what you experience when you plug into your Mobius.
Also worth noting that if you're connected over only BT and using the headset audio option to give access to the microphone then the sample rate of the audio to the earpeaces is also heavily constrained. Headphone is better than headset mode, but doesn't give you the microphone.
Thanks
Chris