PSP
  • Metal Gear Acid
  • Lumines
DS
  • Castlevania DS (9/26)
  • Final Fantasy III (TBA)
  • Katamari Damacy DS (TBA)
  • Kirby Canvas Curve (6/13)
  • Meteos (6/27)
  • Metroid Prime: Hunters (8/22)
  • New Super Mario Bros. (TBA)
  • Polarium (4/18)
So, the PSP has more worthwhile games, while the DS will have more worthwhile games in the near future.