I got them both, and really... I didnt like either of them enough to tell you to waste your time getting either.
I remember that they were really light weight, but they still werent big dogs in the game.
I suggest you only do it if you are still playing the game all the time and are in that phase where you just have got to get everything in the game.
Other wise, dont bother.
but, if your gotta get everything and every car... go for it.