Could you compare Fitear 334 and Andromeda ( and maybe Shure 846) ?
Highs: MH334>Andromeda>SE846
MH334: Perfect amount of highs for my preference and was nice and smooth.
Andromeda: Good amount of highs as well, didn't feel overpowering but felt much more aggressive than the MH334.
SE846: The highs rolls off a lot. If you like highs, you won't like these.
Mids: MH334>SE846>Andromeda
MH334: Vocals comes out forward and somewhat on the brighter side, but is buttery smooth. The MH334 has my favourite vocal presentation of any headphone/IEM I have tried. Acoustic instruments are presented very well.
SE846: Vocals comes out warmer but is still smooth and nice. Great for lower pitched vocals (like male singers). Acoustic instruments are still good but it can't rival the MH334.
Andromeda: Vocals comes out as the most neutral out of the 3 but I felt like the vocal presence just wasn't as convincing as the other two. It didn't give me the "emotional" feeling the other two IEM did.
Bass: SE846>Andromeda>MH334
SE846: Now these hit hard. If you like bass, these are insane especially for when the song calls for it. However, you have to make sure to get a very good seal because if you don't you lose out a lot.
Andromeda: These have a nice tilt on the bass, while they don't hit as hard as the SE846, they are definitely as detailed and well presented.
MH334: Uh these barely have any bass. Not much else I can say. They are well defined though.
Soundstage: Andromeda>MH334>SE846
Imaging: MH334>Andromeda>SE846
Tonality
Andromeda: Balanced (bit of a v-shaped tilt)
MH334: Slightly Mid/Treble forward
SE846: Warm/Bassy
Disclaimer: This is my personal opinion and should be taken with a grain of salt as your preferences and ears may be different. I have also spent a lot more time with the MH334 and SE846 (due to my initial impressions during demo), so my judgement may have been more skewed towards those two.