To start with, i am running Scope 4 on a mac. so no scope 5 here

I have bought the SL9000 plugin, and got two versions. one named SL 9000 S and another named SL 9000 V2.
The V2 is silver stroke UI, and the S is blackish style.
I connected both to a output to do some A/B testing since i don't have a clue about whats the different between them.
And i found out that they have big differences.. seems to be a different filter slope on the LF filter on the black vs the silver.. the black sounds more correct to me.. the silver dosnt really take.
SO my question goes.. anyone here knows what the different is.. and have they different models inside or something?
anyone here knows??
Rgs