Its all about OS not about hardware, think about which OS you know the best, shortcuts, keyboard shortcuts, management and stuff + think of the programs you are using daily. I've been using windows for ~20 years and then tried to run on Macbook - it was really nice looking OS, cool design, expensive feeling and it ended up like 50% dropping my productivity, all damn buttons on the wrong side, each time i wanted to click X i need to click it on the left not on the right + some colors and small buttons + no shortcuts are working no ctrl+c/ctrl+v, no button to quick show desktop, file system completely different, cant find my files and stuff - it was total mess, spent 1 week with very low productivity "learning" to use new OS and sold my macbook pro, bought lenovo got windows and working again full power.. If you will spent 2 weeks of customizing and learning new OS then no matter of the "SPEED OF LAPTOP" since you lost so much time that speed of laptop now doesnt matter anymore