Today technology allows devices to be slimmer, smaller and better for mobile computing by design, so the size of portable computers (both in thickness and weight) is decreasing. For this reason, options that once defined the difference between a laptop and notebook computer are separated by a small, almost invisible fine line today.
For example, When released its UltraLite Notebook in 1989, a portable PC that many attribute to being the first notebook computer, it contained a CPU, RAM, ROM, 2MB solid state memory storage, a built-in modem and one RS-232C port. It weighed 5 pounds. The laptops from around this same time frame, such as the SLT/286, would typically have a CPU, memory, hard drive, floppy drive, VGA display and could weigh up to 12 or 14 pounds. The laptop was typically two to three times the thickness of the notebook.
Buy what you need and you will never be dissatisfied with your laptop notebook computers. It really is no more difficult than that. Take a look at what is out there and buy for you and no one else.