I looked at those and see 300 cycle batteries (about 18 months) so neither make a 4 year laptop.
I'd plan on some repair or parts in the 4 year span.
lenovo thinkpad edge e520 or dell 15r
I am an upcoming freshmen in college and i will be an engineering major. I want something that I can multitask with, easy to use, reliable, and will last me 4+ years