Thanks for all the responses! And yeah, I realised they are 4 complete different games and will go with 2 of them, because racing is my 2nd favourite genre (after Rpg) : Wipe Out and Sonic. I´ve tried the MS rc demo and didn´t enjoyed it to be honest.
And because they are cheaper than NFS because I didn´t like the previous NFS´s I will go with Sonic and WipeOut.
Thank you all ;)