I am shopping for a laptop to run my CNC machine. I have narrowed it down to two certified refurbished Dell Latitudes. They both have 8gb of RAM, Windows 10 Pro, a 14 in screen, and all the other good stuff. One is an E5440 with an Intel i7 chip and 320gb of storage. The other is a E5450 with an Intel i5 chip, 1TB of storage, and HD graphics. They both cost about the same. Which one would be the better choice?