To me, the Rai Penta is not even close to the details that the Khan has. My initial purchase target was actually the Rai Penta but comparing the 2 side by side, it is clear that the Noble Khan is on another level than any other flagship IEMs I auditioned. Yes, it is that good. The biggest differences are the sparkly treble, instrument separation, textured bass and coherence in all frequencies. The vocals (especially females) are just stunning. I, too was hoping that I would like the Rai Penta more but sadly that was not the case (RIP wallet ). Don't get me wrong, the Rai Penta has way better comfort and sounds pretty amazing for the price, and I think it could get very popular like the Campfire Andromeda.