if i recall correctly DMS touched on both if these in this video, sorry i can’t help you out myself, hopefully you can draw something from this. is this your first entry into enthusiast audio?
Or maybe like, get something else entirely?
I’m anti SHP9500, i really don’t like them and i think they are super overrated.
I haven’t heard the KPH30i, but i know they’re so cheaply built and break very easily as well, an online friend of mine has gone through 3 of them so far.
US$40 buys you a used Blon B8, if you can find it, it runs circles around the SHP9500 and its built so well.
Honestly if I were you I would just save .ore money and hit the around a$150 realm as there’s where a lot of the decent less compromises headphones really show up