How to choose a laptop for programming
Ayo Isaiah

You overlooked one aspect in the CPU: core count. Most 13 inch laptops feature dual-core CPUs, while most 15 inch laptops feature quad-core processors. It is important to note the tradeoff in between the two: quad-core processors offer better performance at just about anything but they also consume more power and generate more heat. Recommending a CPU just by its clock speed is a bad idea, since you can have an older CPU that can also hit 3GHz but will offer slower performance than a more recent one.