I already heard about that too. Only the full version of RaceOn contains STCC. Since I also had STCC before I bought the RaceOn expansion (over STEAM) this was not so obvious to me at that time.

Regarding the price I must say that if I only look at the price of the expansion I find 25,- € not too pricey. That is of course only the case if you like the content.

On the other hand the difference of 5,- € between the full version with Race07 and STCC included and the expansion without these two is a joke.

For me it would be worth the money if I got the chance to use it online more. But sadly servers that make use of the new content are still very rare.  

I have bought the expansion and had stcc before, so it just added RACE On to my list of Steam Games.

The full RACE On bundle including RACE 07 and STCC - the Game, introduces the biggest, best and most comprehensive SimBin racing package ever.

There are some ForceFeedBack improvements IMO. The US Muscle Cars are fun to drive. I have not used it that much yet.