Basic Factors That Determine Paper Quality

1. Paper finish, texture, and grain. Seek only paper that not exhibit a glossy or slicki feel and has a well defined grain structure. Cheap paper is in likeness to driving a car on a slick icy surface the car goes nowhere as does the prper (instant miss-feed /jam). Also for copy quality, copiers like to have a properly finished paper for the machine to lay down and fuse the toner effectively.
2. Substance weight / thickness. Most all copiers require a minimum of 20lb. Subatance weight / thickness. Generally cheap paper manufactures will fudge a bit on this specification making the paper lighter / thinner than quality paper with the same specs.
3. Structure and strength. Paper structure and strength are a very important factors. For the  copier draws paper from the paper cassette into the machine and then generally pushes the trailing edge of the paper to the next set of rollers. If the paper lacks sufficient strength it will buckle under this pressure creating an instant paper jam.
4. Color / whiteness often referred to as "Brightness". The cheaper paper will not exhibit the whiteness / brighteness of a quality paper. This however is only aesthetics and does not affect the performance of the machine. You will be however amazed at the difference if you dare to compare.