Hey guys! We have a 1965 Topps Roberto Clemente card. What is the difference between a card described as "o-pee-chee" versus one that is not described this way?

My friend has the aforementioned Topps card yet when looking on eBay we see a card with above in the description and then another listing for what appears to be the same card without that language.

There is a large difference in value...can someone explain the difference?

Thank you!

Tom

Go Pack! NC State graduate 1981