I am not very good at describing the sound but I will give it a try.
Initially, the blue filter sounds fine but when change to white filter, personally, i like it. The white filter seems to make the music sound more transparent and better high. But some music might have sibilance which is due to the song. So I end up changing back to blue filter.
But still not satisfied with the sound. So I upgrade the cable to ALO sxc24 2.5mm. Wow! The sound with blue filter is good! I am not a believer of cable upgrade but when I try it at the shop, I can hear the difference. Maybe it is because it is a balance cable instead of cable difference that make the difference but I do not know. The bass and treble is good! Now, I also begin to understand what people had been talking about layers on the sound. The separation of the sound which previously I cannot differentiate but now I can with the new cable. Now, I can hear the sound stage is wider, clearer and can hear the layers. I do not know how to describe layers of music but I can only understand it now.
Yet, I still not fully satisfied so I try out what I learn here about the modded blue. Wow! The high is even clearer without any veil at all and the bass just slam it onto your ear. I can hear some details which I previously did not hear with blue filter unmodded.
I do not know if ear had to be train. Personally, I had upgrade slowly so I start to learn to hear the difference in sound quality. Now, I know what is the sound quality that I prefer rather than which is better as some like warm sound which I like but not too warm. Now, the setup of Shure 846 with ALO sxc24 with modded blue and AK100 II is the best I have and feel satisfied. Dare not try Hugo or new earpiece like Angie or "Layer" (which I forget the spelling) as it might poison my ear and burn my pocket again. So now I just stick to my current setup.
That is all I can describe about it which I know it is not very good but just to share what I hear the difference.