To answer your question: the 360 has been more successful than the PS3. It's pretty easy to see that.
Now that's not to say the the PS3 isn't successful because it is. Not compared to the PS2, mind you, but when you consider it's launch it is currently quite successful especially when you consider that it greatly aided Sony in winning the current disk-based format (Blu-ray vs. HD-DVD).
Also the replacement argument is ridiculous since all things considered it's probably a wash. And if you do really want to argue that a significant amount of 360's that have been sold are replacements remember that this would mean the 360 is by far a bigger core gaming machine since it's attach rate would be absolutely obscene compared to any other console (especially, ESPECIALLY when you factor in piracy). Basically, I'm saying in this instance that you can't have your cake and eat it to.
Also I have to note that whenever I hear people say stuff about a lot of consoles that they know have been replaced by buying new ones (either for the PS3 or the 360) I know that the vast majority of those instances are exaggerations at the least and blatant lying out of their asses at the most.
Now everyone needs to stop being silly over this conjecture (including me :P ) and play some Bioshock Infinite; it will make you a happier person.







