The S-series I returned to Mike are actually 02 versions already - the only difference is the cloth grille rather than the metal grille that the upcoming 02 will have. If you buy the last remaining 02 now with cloth grilles then buy metal grilles for them in the future - it would still turn out to be cheaper than buying the upcoming 02 by next month. This is due to Mike's promo in marketing the last few sets.
With the help of SVS, both Mike & I confirmed the ff differences:
1. Box art - the box art graphics of the 02 has the blue logo and text of the new 02 features on the box
2. Tweeter is black on the 02 than the clear/grey tweeter of the 01.
3. Non-shiny dustcap of the midrange in the 02.
As for the STS and SSS speakers, there are no 01/02 of these speakers. They were released later by SVS on the onset with new drivers already. There are also no metal grilles on the STS and SSS speakers - whether new(02) or old (01), they only came with cloth grilles.
To be honest, sonically there's not much difference between the 01 and 02