Here is my impressions of the Ares S 8 W:

In short it is the cable with the most natural uncoloured and extended treble topped with very high resolution I have heard so far. It is so resolving you will need a high resolution IEM to get the most out of it.


My preception of the sound of original Ares S
The Ares S is a rather natural uncoloured cable with good speed. It has the most extended treble and bass and also with the least coloration out of the original Signature series (the Eros S is just a tad behind). Due to the good speed the bass is tight and the background is black and the treble is crisp with medium density. I personally perfer pairing it with some naturally tuned IEMs for the punchy bass and smooth treble extension with a bit of that holographic effect.


The Ares S 8W
The Ares S 8W doubled the core, is not exactly double the sound of the Ares S. It's more than that and although they share some similar characters, they sound different.

Treble
The 8W first of all as I mentioned has the most extended treble I have heard. It is in fact so extended that the drivers in your IEMs may not be able to reconstruct all the frequencies but it works well for almost all IEMs. Just like the original Ares S, you will likely get the best results with naturally tuned IEMs and I have very impressive result with the BQEYZ Winter which is a bone conduction based IEM (BC unit for the treble and DD for full frequency).

The treble is not only well extended but also very dense, dynamic yet very smooth. You will immediately hear the extra smoothness and density when switching from the original Ares S. Moreover there is noticible more air around each notes to enhance the immersiveness. The resolution of the cable is also a major improvement over the already very good original, it's like you thougth you have heard everything in the mix and then you realize there is a lot more you can hear without disrupting the musicality. By analogy, it sounds to me you are hearing a music file with twice or more the sampling rate compared to the original like all the gaps between each sample are filled.

Mids
For a rather naturally tuned cable, the mids are pretty similar to the original but just a tad more forward likely due to the increased resolution. The original Ares S has a blacker background for the same reason. The mids are also denser and smoother and a bit more energetic.

Bass
The bass is more punchy and textured. The original is no slouch but the 8W is just more textured and fun. I have been listening to a lot of Alan Walker with the above combo and it's fun, really fun.

Air, staging and resolution, etc.
There is just a lot more air and the stage is more expansive due to the air and the resolution. The resolution as I mentioned is on another level. The combined effect with a good matching IEM is that you don't feel like you are hearing an IEM anymore. It is that good! To be honest this journey has totally widen my horizons of how good a cable and an IEM can sound. Morover, despite having more cores, the 8W actually feels more flexible in hand due to the denser brading with more wires.

Cons
Only two I can think of is first the chin slider is on the slightly heavier side but I am totally fine with the weight and the Signature pouch may not fit the 8W very well due to the extra core!