FWIW, I owned a Sota Star Sapphire Series III (with vacuum), which was a product of the original Sota company, for most of the 1990s. Even when I owned it, I had the feeling that the bass response was a little on the "woolly" or muddy side and I could always hear pitch instability on piano notes. However, I could never be sure that the problem was due to the SSIII or to the way the particular LP was mastered. Around 2001, I replaced the SSIII with a Nottingham Analog Hyperspace. Listening to the same LPs on the Notts (with the same tonearm and cartridge in both cases, I might add), I came to believe that the SSIII was indeed to blame for the flaws I had perceived. About a year ago, I moved to a Lenco L75 in a custom wood plinth, still with the same tonearm (Triplanar) and now using a Koetsu Urushi. With the Lenco, bass reproduction and piano rendition took another great leap forward vs the Notts. I realize that the Cosmos and the Millenium are new products that supersede the Star Sapphire. They have a lot of avid fans here, so I assume that the problems I heard with the SSIII have been eliminated (altho it is not obvious to me how this was addressed), but it's something to be aware of. Certainly they are both great looking and apparently well made.
