I have a SR-507 at home, and I think Shuoer S12 is more resolving than them. I also have a Salnotes Zero w/ Azla Xelastec ML tips for improving the 'spatiality' of the IEMs, which I think has better timbre than S12. I also have NICEHCK cheap earbuds which has a very good price-to-performance ratio.
My impressions of the Serratus? It smokes the S12, Zero & NICEHCK earbuds. Haven't tried with my desktop setup since I'm not at home.
UPDATE: Mini-Review after 5 hours of listening. I noticed that I have been grinning the whole day after listening to these pre-burnt in. They have definitely made my day. Now I have settled in 1-2 hours more, I can say that the overwhelming amount of detail that is perceived is far far beyond that of S12, so overwhelming that it's not suitable for certain of my daily tracks. On the positive side, I am able to hear things that were not present even before my SR-507. (Unsure that being the changing of DAC/Amps.) Overall, everything is just "wow". The timbre, the technicalities, the resolution, bass, mids, treble, all these categories surpass my previous headphone & earphones that I have owned. There is so much "wow" factor in fact that these buds never stop surprising me by showing new things in the old tunes that I used to listen 4-6 years ago. The pair of earbuds not only brought me a trip down memory lane, but also introducing me to appreciate and find favor within new-old tracks. The tracks which I have never paid any attention too, that I had judged them unworthy of merits, the Serratus brought new light to these tracks, highlighting their favor.
Well, any negatives? There's one- nah, not one but two. One is being mentioned above, and that is highlighting too many details at once, as running it through several loud & busy EDM tracks causes fatigue. I have to tone down the volume to avoid sibilance while listening through a degraded quality. Depending on some people, this could be a positive trait than a negative. The second negative trait corresponds to the previous trait, as Serratus can highlight the deficiency of tracks that were not mastered well. Even though I think they are far from being an analytical pair, Serratus are a very revealing pair of devices. They not only 'reveal' tracks, but also 'judges' them. Tracks that don't go well in their mastering process will be easily revealed by these earbuds, leaving those unmastered tracks behind the 'unworthy' class. That reminds me, there is a third negative trait as well. Coming from a treblehead, these are very sub-bass focused pairs without burnt-in. Plugging in and listen firsthand, you will find they are bloated with bass while having quite sibilant treble. These issues are mostly gone by the time that I am writing this, what I have now is a pair of very musical, transparent, and addictive earbuds that will make me smile.