Wow, who did you get to trade you? Even trade? The Oxygen retails for more the twice the price of the FH3. For me, the FH3 was a great example of a sound signature I like, with solid technicalities and performance, yet inexplicably boring to me. It just felt uninspiring.
I also am really starting to think that there are numerous slight characteristics to the sound of certain IEMs, particularly single-DD IEMs, that give it its own (for lack of a better word) “timbre”.
Oh, I worded it poorly. It was not a trade 1:1, my FH3 was up for sale and a guy at my local community offered me trading for it + some cash (FH3 is very hyped here ATM), lol. I agree with you, but, my pair had such an annoying driver flex and when walking I could hear the driver moving so I never wanted to use it for long sessions. I wish they had a version of FH3 using just their 1DD or maybe the FD5 can be that.