Few words about Eos, which I am also really enjoying at the moment. The difference between Ares II and Eos is the plug and high quality platinum-based solder. People might expect these are just minor parts in comparison to the wire, but they contribute a rather large portion of the signature, if I would estimate maybe around 30% or more. One must not forget these form the contact point between the cable and the other parts of the chain, and influence aspects like the resistance of the signal. Eos is not my first experience with the Furutech / Platinum solder. A while back I had my plusSound GPC reterminated from 2.5 to 3.5 by MS, and they used their favorite combo at the time consisting of the Furutech plug with Mundorf silver/gold solder. When I got the cable back, it had lost its characteristic completely; it transformed from a warm natural sound to a clear, open sound, pretty much void from warmth; in an a way it resembled going from Zeus to Zeus-ADEL for me. Other characteristics as the stage and midrange remained similar, but the difference in tone was striking. I sent back the cable, and they replaced the Mundorf solder with the platinum solder, making it have the same plug/solder as the Eos. While the GPC still wasn't nearly as warm as it was first, it had a smoother, more natural signature.
So moving on to Eos, which is a variation of Ares II, but with a different signature. Ares II is warmer, while its lower treble is also a bit brighter. Eos has a more linear signature that comes closer to neutral, due to a slightly more elevated mid- to upper-treble. Not to the extent of something like Horus or 1960 4-wire which really pushes out microdetail, but its finer detail is more pronounced than Ares II, making it more resolved overall. It is a bit of a musical variation of neutral in a way, that sounds detailed, but presents it in a smooth, coherent manner. Its mid-bass is slightly elevated, but clear on impact, just very enjoyable to listen to, while it maintains a similar airiness as Ares II. While its treble is smoother, it is also more transparent; just a lovely lower treble tone. Overall, Ares II is warmer and darker, although its timbre is slightly more accurate for instruments in comparison. Eos on the other hand is more versatile for me, as I also enjoy synthetic-based music. Unfortunately I can't tell whether or nor people will find it complementary or worth the upgrade to Ares II if they already own it, but I personally do. I don't find Eos good for its pricerange; I find it good regardless of its price.