Which Laptop is better in general?

Hi and Thank you in advance!

I am a college student who would like a lightweight laptop that boots up very fast and has moderate gaming capabilities. I narrowed it down to 2 pretty cheap ultrabooks.

$680(Asus Zenbook UX305FA-USM1 13-Inch Laptop) and $629(Lenovo U31-70 - 80M500E5US)

I am not keen on superior processors and graphics cards, so it would help a lot if someone could decide the better product for the price.

The specs for the ASUS option is:
Processor: 2 GHz Intel Core Duo
RAM: 8 GB
Hard Drive: 256 GB SSD
Graphics Coprocessor: Intel HD 5300 Graphics
Chipset Brand: Intel

And the specs for the Lenovo option is:
Processor: 5th Generation Intel Core i5-5200U Processor (2.20GHz 1600MHz 3MB)
Graphics: Intel® HD Graphics 5500
Memory: 8.0GB PC3L-12800 DDR3L 1600 MHz
Hard Drive: 500GB 5400 RPM

Thank you so much for your help and if there's a better, light (under 4 lbs preferably) ultrabook that doesn't cost more than $700, please let me know. Have a great day.

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