Macbook Aluminum

Which is better, the new aluminum macbook or the old plastic white macbook?
I’m thinking of buying a macbook. But it is hard to choose between the new aluminum one or the white plastic one. I not exactly just choosing according to the design, but also the performance. The old one is much cheaper and the aluminum is more expensive. I really want the aluminum one but it is expensive. But I want the best for me even though it is expensive. So I really need your help. Thanks!
On the Apple Store, the $999 white MacBook and the $1299 aluminum MacBook have the same specs (CPU/RAM/graphics/screen) except for hard drive (160 vs 120 GB).
So if an extra 40 GB and nice aluminum design don’t concern you greatly for a $300 price difference, then white MacBook if for you.
Older white MacBooks use Intel graphics that isn’t suited for gaming if that’s your thing.
New Aluminum MacBook