Hi everyone, I have a question I've been thinking of. First of all I'll go to college nearly and I want something to help me be more productive. I'll be in electrical engineering, and for that I'll be using AutoCAD and Matlab and other programmes for sure. I don't think of playing games at all. Which one of these suits me better, surface pro 3 i7 or surface pro 4 i5 ? Note: they are at the same price right now .