Is the Beatles Rock Band better for the PS3 or the XBOX 360?

I am getting it for christmas, and I don't think that my stepmom bought it yet. I have both systems, and I like both, I just wanted to know if it was better for either one. I know on the 360, you can get "All You Need Is Love", and I don't think you can for the PS3. So, I'm guessing it would probably be better for the 360 because they will have better/more music to add-on.