When MacWorld tested the two, the unibody was only marginally faster: 4.8% in speed tests, and a few seconds either way in most of their other tests.
Before you go off spouting claims about how different the performance is, try doing your research first. Yes, the unibody is faster, but not by much. And given how much less expensive the white MacBook is, it's a better performance/dollar proposition.
As for "if you think it's not that big of a deal, then the only tasks you do are basic computing tasks", what's wrong with that? For the OP's stated uses, the white MacBook will be more than sufficient. And anyone looking for a machine to use for "apps that matter" is likely looking at a MacBook Pro anyway. :
You're extremely arrogant if you think the only apps "that matter" are the highly demanding ones. Email might be a "basic computing task", but for many people it's a critical method of communication. You're also a hypocrite: if you think computers are meant to be used for things "that matter", then an internet forum is not where you belong.
Get your "facts" straight and stop pulling random garbage out of your sorry behind. I never once claimed that the UMB is a better "performance/dollar". Nor have I expressed any opinion to anything wrong with the OP's uses. Nor have I claimed that apps "that matter" are "high demanding ones". From a computer's POV, email is a basic task. I don't know what computer you're using but mine certainly thinks so. I never once claimed that a computer's sole purpose is to be used with things "that matter".
Why don't you take your own advice and stop "spouting claims" that you made up????? Hypocrite.