Purple one is the code 24c limited, and blue one is the code 24. IMO, code 24 or the blue one is almost superior in every category except the ergo (of course since code 24 is almost twice the price of 24c).
Code 24 is SPC and 24c is pure copper.
In term of performance, code 24c is more for vocal and midrange while code 24 is much, much more exciting with more V shape, or at least more bass. Someone said code 24 is code 23 on steroid but I did not own code 23 to verify that.
BTW, to demonstrate the bass of code 24, try this one below (if you are not patient, start from 6 min, with the build up and the final drum percussions)
Listening to it right now and it's very nice indeed. Unfortunately my audio memory isn't that great and I've found l lack the delicacy of perception requisite to really do a fine toothed analysis between sonic differences in cables...though admittedly there does seem to be a dash of secret sauce present here in the bass relative to the gold plated silver cable I was previously using which seemed to place more emphasis on clarity in the mids and uppers.
Some recent discussion got me thinking about a factor that all too often is missing from some of the interactions in this hobby...and that is humility. Our current capacity for online transcontinental interactions has helped created a community whereby folks of all ages, nationalities and various other persuasions spanning the globe have come together in a rather unprecedented way to share and celebrate their experiences in this hobby. There is, it seems, no limit to the variety in perspectives and experiences we can all bring to the table. Sometimes, being only human, it can be difficult for us at times to see beyond the horizon of our own biases and temperaments. I have been guilty of this myself at times. Affection for cables for me is a classic example. Once upon a time I couldn't really understand all the discussion I witnessed around cables-- with folks testifying to a degree of sound tweaking and nuance with cable swaps that was utterly foreign to my experience and understanding. It would have been very easy for me during those times to join the ever present chorus of folks who treat cable enthuiasts and cable rolling with scorn and scepticism However instead I chose to reflect on how many highly experienced, well informed and consistently reliable people I saw, time and time again, testifying to their experiences of the wide vistas of sound tweaking that can be accomplished with a little cable rolling. I'm still not there yet with my own perceptions and experiences, however my horizons and perspective has been thoroughly broadened around the degrees of subtlety (and often not so subtle) that can be affected with cables.
The same I would argue is true of IEMs. There are some IEMs I just don't get on with for a variety of reasons-- but when I see numerous folks within a broad and experienced community like this one highly regarding them my first instinct now is to try and understand the different points of view people bring to the table and index my own disatisfaction, if it persists, in a way that conveys understanding rather than implying that all these folks are heaping praise on a broken or otherwise undeserving IEM.
All of that said, haters gonna hate but this particular source and IEM pairup remains the pinnacle of my own personal audio explorations. YMMV, and all that.
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