I have both the PFEs and the Apple Dual Drivers, and I really am surprised to hear you want more detail. Those two phones are similar, but the PFEs cost $155 for the mic version, and I really am happy with the Apple DDs. Are you getting a good seal with them? I didn't like the OEM sleeves and changed to a pair of Sony Hybrid silicone single flange tips, which cost $9 on Amazon for four sizes. Why not try that, a much less expensive change?
I really like the detail from the Apple phones. Not everyone will agree, of course, but that would not be their weak spot. Maybe a little harshness, but I had the er6i in another life, and I got very tired of changing those annoying Ety filters, and found them very bass lite. Anyway, they are Etys, so maybe detail is better than Apple IEMs, but hard to believe they are that far apart.
Instead of new phones, get a nice iBasso T4 and use the bass boost with your Etys.