Yes you can tell the difference between 65 & 66. To the perfectionist it is a big difference. Also the price reflects the population. Sure you can do what ifs or I can grade myself but you will quickly learn you had better odds at the slots! That being said only deal with NGC or PCGS as the grades are accurate and thorough. Never pay full price according to the guide. I figure 10-20% off list is good. Happy hunting.