take it back !!!, i tested both in person for over an hour each, the PS3 only runs in 720p as the 360 is in 1080p and the PS3 has tons of jaggys, lower res textures and a lower frame rate. oh and dont forget that the 360 version has DLC that the PS3 wont ever get.

im a PS3 fanboy so i was crushed by this lol but i love fallout on my xbox, seriously if it hasnt been opened go swap it and pay the extra 5 its worth it. 

/vomits on star ocean

get monster hunter freedom 2, lumines, daxter (like $4.99 used), disgaea, yggdra union,  patapon, locoroco, tales of eternia, crush, star wars force unleashed, castlevania, metal gear acid 2, valkyrie profile, katamari, dungeon siege ( if you like dungeon crawls), and metal gear portable ops ( NOT PLUS!!) 

any questions 

oh and in before lock :)

kingdom hearts

patapon 2

locoroco 2

phantasy star portable

monster hunter freedom unite

that crazed level 5 game about the mech models

ushiro

dungeon maker 2

star ocean 2

mana khemia

resistance retricution

prinny: can i really be the hero?

dissidia

parasite eve

final fantasy agito

dj max portable

and a few others.

thats more than i want for the DS next year