Should I get Punchout!! or Little King's Story?

[JUG]

DOLBYdigital said:

First, I would strongly suggest waiting to buy MP3 and just get the Metroid Prime Trilogy that is coming out mid-August. It will have MP1, MP2, and MP3 all with 480p, widescreen, and wiimote controls for normal price which is just spectacular!!

Off topic - could someone tell me once and for all is there any difference between Metroid Prime 3 on its own and the Metroid Prime 3 that comes with the Trilogy? Does it come with better display or sound options now?

I reckon I'll get MP3 on its own since I already own 1 and 2 and I think I can get 3 for half the price of the trilogy on Amazon.