captblaze
Headphoneus Supremus
I faced the same dilemma a few months ago and opted to stick with the 2 pin connector due to cable pricing. I didn't do any objective quality comparisons or anything, but it does seem like the marketing for the IPX suggests it's more robust and sweat resistant long term. I don't disconnect/reconnect my cables frequently, so the wear on that connection isn't as important to me as the cost to replace the cables when need be. I'm on my 4th set of wires in the 3 years i've had them...
I had my 18+ Pro changed to IPX
my UERR socket just crumbled recently I am sending them in for a repair to the same (SL socket).
personally each can fail in its own way. the IPX socket is encased in the shell so you don't have to worry about it crumbling although it can end up with the tiny little cable end snapped off inside with some side pressure