The answer to your guestion is yes, there are different levels of quality in patch panels. But, price is not a always a sure indicator of quality differences. A lot of dealers sell good quality patch panels from
Goodmark Industries but charge different prices for the same panels. It basically depends on how much they markup the panels from their dealer price. For instance, I recently bought some trim pieces from an on-line dealer for about 15% less than I could get them direct from Goodmark, but the trim was shipped directly from the Goodmark plant -- the dealer bought them from Goodmark at a dealer's price and passed along the savings to me.
Before you buy panels from a dealer, call them and ask who manufactured them. If they won't say, then shop somewhere else. The dealers that carry the good stuff will be glad to tell you. Then, check out the price of the item at the manufacture's web site (if they have one) and compare the price. A lot of the time, the dealer's price will be less than you can buy it direct from the manufacturer.