FWIW,the Cosmos is far more beautiful(IMO)than the Millenia.It has the advantage of a "nested platter",not unlike the pricey Continuum tables(the belt and motor are not subject to as much dust/air borne pollution).Also,the Cosmos(I've owned three different mod/type-series I,III,and the IV which is fabulous,and a steal at the asking price)has a locked motor mount that keeps constant tension on the belt(it is also very silent),for a very(really,really accurate)precise and constant platter speed.
I believe the suspension is a little different(not positive),but the table is wonderful,and the vacuum aspect is absolutely effective,and very silent/reliable.
All tables mentioned are "wonderful",IMO.Yet,the Cosmos does have one weakness(from what I see from many hobbyists' choices)...it is simply too "realistically priced"!!AND has been around(and updated)for too long,in order for SO many audio hobbyists to "realize" just how fantastic,and reasonabley priced it is....A BARGAIN IMO!!...If it were advertised more(Sota is very low key here,and relies on word of mouth)and were priced FAR higher,and called something like "Ultimate Reference" there would be more sales.Silly,and just look at the web-site for a good education on it's features,advantages and benefits to the owner.
Best of luck.