Well, considering that nowadays even a Khartago/Cyclops is practically better sounding that an old Stratos, maybe just lacking some output Watts, I can say that a regular Stratos sounds better today, better voltage regulation, better circuit board, better transformer, custom capacitors, adoption of Groneberg cable, a much more reliable light display, beter tunning also.
I have been listening to these products for years since 1999 or 2000 and is my opinion that thare have been big improvements in sound quality over the years, still I have Odyssey in my system and I think I will keep that way.