I just printed the same file on two different papers. One was Canons photo paper pro II 4 x 6. The other was Canons photo paper pro platinum 13 x 19. Using Canons Pro 9000. The paper profile in CS5 was PR1 for both prints. In the printer properties I did select Photo paper Pro II for the 4 x 6 and for the 13 x 19 I selected Photo paper pro platinum. The platinum print was darker than the photo pro II. Is this due to just the different paper profiles?