(1) When comparing these three IEM's, the Fitear 334 immediately presented itself as dark and muddy and established itself as my least liked of the three. It very quickly became a race between the Kaede and the Tralucent 1+2.
(2) The Tralucent 1+2 is a very impressive IEM, in that it is very revealing, airy & open, and endowed with great dynamics and bass. However, there is a brightness and harshness to the sound that I could never completely shake. I've read that the Uber cable eliminates this, but I find it hard to accept that a $1300 IEM needs a $1100 cable to consumate its potential...
(3) The Kaede is the perfect middle ground, as in just right! After a steady diet of Tralucent, Kaede is a model of balance. Great bass, musical mids, VERY well judged treble (I think maple shell plays a role here), an open headstage. In my system, I do NOT notice the harshness and treble emphasis that people have discussed.
(4)However, removing the hardness (completely from Kaede and mostly from Tralucent) required that I use a DIRECT connection between the Pico DAC/AMP and the PC using a USB adapter. The insertion of any USB cable, even a superb one like the Mapleshade Clearlink Plus USB (compared to $500+ cables) added a bit of bleached whiteness and silibance.
(5)Kaede responded very well to tip changes. I immediately found the stock Comply tips to mute the treble and disliked it. The large Ortofon tips were SO MUCH BETTER that it's essential. I have also recently found that Monster Super Tip (Large Foam) is superb as well, improving upon the bass of the Ortofon (which seems a bit lossy in the bass) yet retaining the treble openness.
Wow I found the Kaede to be noticeably more fatiguing than the Tralucent on the gold cable... Could not shake that issue. Stuck with the Sui and found it much more to my liking. Definitely smoother sounding to my ears.