I'm really leaning toward the Mac, because it will remain relatively clean for my college experience, whereas Windows can bog down. You agree?
If you're tight on money and paying for this machine yourself, you should know that a notebook is
not necessary for university/college (save for specialized programs like architecture). Sure, it's convenient and makes life a whole lot easier, but you can still locate a computer in the library and get your work done there. Just wanted to throw that out there (too many people believe otherwise).
Now, in response to your post, I think you're asking the wrong questions. If I were you, I would be less concerned with finding a power outlet and more concerned with the weight of the notebook. I know this sounds crazy, but 1lb will feel like 10lb once you stuff a few textbooks in your bag. Size and weight should be your primary concern; build quality comes in at a close second. Remember, this thing is going to take some daily bumps no matter how careful you are.
Next, I would ask yourself what specific things you intend to do with this computer. If your answer includes:
- word/powerpoint/excel
- surfing the net
- music
- downloading/watching movies (legally, of course

)
- Odd photoshop, etc.
Then I'm sure either computer will do you just fine. From my experience, a 13.3" screen is the perfect fit. It's small enough to carry around with good battery life, yet it's powerful enough to handle various tasks and you don't strain your eyes when typing. Truthfully, I really wish I had one when I was an undergraduate. I would also suggest that you carefully consider how much you want to spend. Remember, you will be dirt poor in a few years time! I think the low-end MB might be a good fit. It's powerful, durable, and not incredibly expensive (but still overpriced, IMO). Don't fall into the trap of thinking that expensive = better; buy according to your needs.
I agree that OS X will get less bloated, but you still need to maintain it. I also strongly recommend an external HD. Believe me, you will need it for backing up your files and storing the clutter that you're bound to accumulate.
And finally, if you're going to take any liberal arts courses, for the love of God, do not bring your computer to class! You should always take notes by hand and make your own meaningful connections between the material being discussion. Trust me, it will improve your grades (look up the 'generation effect').
Best of luck and remember to do your homework!
P.S. Put the computer away
prior to drinking.