[horrorshow1980]

Does anyone know how to tell the difference between the regular base cards and the different paralells? I can't figure it out since there's no info on the back. For instance I have 2 Blake Griffin rc's from the 09-10 set. One has a pic of him going up for a dunk and it says " Rookie" going down one side. The other one still says rookie but has a pic of him shooting a free throw and it has refractorish/holofoil thing going on and it has a gold facsimile autograph across it. The reason I want to know is because some of the variations book for quite a bit more. Thanks in advance for any info or help.