Processor on the new computer is a tad slower, but you won't notice it.
If you are ok with losing $300 on the computer, for the meager upgrades, then go ahead. EDU price is 1100, if you can wait until the end of may/early june you can get a free ipod.
And don't forget, they also give you a free printer.
The real world differences in battery life are probably only an hour or so. I am running a SSD and just unplugging my laptop it says 3 hours, I have everything except bluetooth on, and on the new computer I'd expect like 4 hours like this. Crank the brightness to 1 and maby you will see 7-8 normal use. If you shut everything off and read an ebook maby you will get the 10 hours. I've gotten some pretty amazing times just reading a book. If you get the new computer, you will be future proofed for maby another couple of months.
Yet you will be getting a NEW computer, for little to no cost to you, that's always nice.