more ports (i.e. pci) compatibility with better graphics cards (PCIe instead of AGP), compatibility with better processors (LA775 instead of Socket 472, or AMD quivalent), better built in features such as sound, faster data pipelines for increased performance.
The main way to tell the difference between a cheap and an expensive dress is the price. The type of material and brand can also be an indication of cheap or expensive.
Quality
Quality, performance and Longevity.
cheap is when something is not expensive. frugal is to be wise and wary of over spending on something.
The cost (obviously) and the material used to make them.
How long it will last and performance.
The different between cheap and expensive spectacles is usually the design of the lens surface. Brand names also play a major role in the price of the spectacles.
the difference between expensive and cheap laptops and notebooks is the quality or quantity of it, usually quality is better because of what it has to offer and usually has warranty on it compared to the cheap laptops usually have more trouble with them
One difference is that one costs more ;-)
Quality of the chipsets, amount of ports, bus speeds, limits of memory CPU speed. Kinds of ports. Optional things like raid, firewire etc.
The difference between cheaper and more expensive versions of the online game FFXI's currency, gil, is the amount of gil you receive. More expensive versions offer a larger amount of gil.
There is not a significant difference between any type of alcohol.