Concur, I also found my buddy's Smurf to be very old school Ks sounding as well. This is a very accurate description. Since I already have a number of warm/dark bassy earbuds I went for the more neutral and ear friendly Ks Bell-Ti (120Ω; aka "Titanium Ling") which have been excellent for very extended listening (super comfortable and absolutely no listening fatigue to speak of).I try only K's 32, Nameless, K300, and K's Bell-WE Bass Version. I liked the latter the most. But I want to try K's Bell-Blue after the small review of one buyer "I own older K's earphones like the 300 Samsara and 600 but after getting the Bell Ti 120ohm, I wanted to satisfy my curiosity for the model which sits in between generations. The Blue Bell or "Smurf" is exactly what you would expect it to be if you have been following K's progression. Older K's plastic shell earphones have rolled-off treble with an emphasis on bass response. The newest Bell Ti has a neutral tuning with excellent detail. The Blue Bell splits the difference by having most of the detail of the Bell Ti with some added quantity to the mid-bass and bass response. If you are considering the latest flagship Bell Ti or Bell Onmyoji earphones and want an accurate/neutral tuning, you should stay with that plan. However, If you want a slightly warmer, more relaxed performance that is closer to the K's earphones of yesterday + the modern aluminum shell this might be for you!"
Wouldn't call the Bell Smurf bright though... it is still a rather warm earbud. The Smurf does have some sparkle in the treble that people like... very nice treble however, it is fatiguing for me but I wouldn't categorize it as being bright or even sibilant rather maybe a bit "excited".Most of the Chinese reviews I've come across for Bell Blue described it as having a similar bright sound signature like the Moondrop Chaconne.
Very well extended in the treble region with a wonderful sense of detail, transparency and airiness, that's excellent for female vocals, violin etc.
Not too sure about the bass part though.
While the general consensus is that the Bell Blue has even better treble than Bell-Ti & Onmyoji 2020, some did mention that it has slightly lesser bass quantity compared to the latter two?
I think most of these reviews that you speak of are comparing the 32Ω Bell Smurf (Blue Bell) with the 32Ω version of the Bell-Ti and not the 120Ω variant which is most definitely a step-up from even the Smurf in most all regards besides bass... whatever the Bell-Ti 120Ω lacks in bass depth (slam) it makes up for it with excellent bass detail and timbre.
Concur completely; the Turandot is a very warm, almost dark earbud... great for extended listening and for those sensitive to bright/sibilant sound signatures. Though they are a tad heavy for some I surprisingly find them very comfortable to wear with no issue.Wouldn't recommend the Turandot if your preference is for airy treble, as it's a little warmer sounding compared the others mentioned above.