TBS6925 V1 also using older cut (2.0) of STV0900 (STV0900AAB). In TBS6925 V2 there is updated STV0900AAC (cut 3.0) demod.
It is very easy to check actual card version. It is written on it's top side in corner. There should be V20, V21 or higher, which generally means that this is V2.
As far as I know TBS 6925 V1 were never in official sale, there are probably only few of these cards in betatesters/DX-ers hands
All cards that are now in stock (from beginning of sale in june) are TBS 6925 V2.