I’m loving them…and yes, they sound better than the wired. my only complaint is their clamp is a lot tighter than I’d prefer, so I hope use on my fat head stretches them out and eases that over time.
have you done any pad swapping, with the Yaxi’s or anything else?
for me the wireless is more fun but honestly too much as it’s a bit muddy sounding compared to wired (the thicker earpad I assume is a part of that).
the clamp is really bad for me especially with glasses on hurts after 20-30 mins.
last I checked there weren’t any replacement pads for the wireless yet and haven’t heard if anyone is planning on making any
yeh, the clamp is pretty clampy. as for pads…I would think you would just force a Yaxi made for the Porta Pro as it will eventually conform appropriately. though I seem to recall some saying to cut out the center bit of the foam pad on the KPH30 helps too. 
Hair dryer on the headband and gently flexing it maybe worth a go 
If the clamp is stronger then that is a factor for more bass.