I think we could say...........
PS3 is more media orientated. BlueRay player, PlayTV, ability to connect PSP, laptop, stream movies etc.
360 is more game orientated.
Both play games, both have some specific titles of games only available to that console.
PS3 has free online game play but voice comms is not so good.
360 has pay content and voice comms is great.
PS3 has recently released pay content but not much feedback in as yet as to how good it is.
Some still argue that the graphics are better on 360. I think though it depends on which game is being played.
360 has the bigger community.
PS3 has MAG biggest online FPS game based on the number of players who can play at a single time on one map, up to 256.
360 and PS3 have Battle Field Bad Company 2 but 360 has the largest number of players playing it.
I think that about wraps it up.