Lenovo laptop G50-70 and G50-80 Which is better, what is the difference?

Lenovo G50-70MA-IFI, 15.6 inch screen, ultra thin, i5-4210U processor, 4G memory, 500G hard drive, GT820M/2G ordinary single display, Win8.1 system, white / black look, 2.5kg

Lenovo G50-80AT-IFI, 15.6 inches, 1920 x 1080 high. Screen. Screen, ultra-thin, the fifth generation i5-5200U processor, 4G memory, 500G hard disk, R5 M330/2G entry level, Win8.1 system, black appearance, 2.5kg