....from 1974. The front is identical to the Topps front.
The Topps card is on the right, the OPC is on the left. The difference in color is more of a scanner issue than the card.
The backs are quite different.
Obviously the OPC card has a yellow background while the Topps card's is green. And since the OPC card is Canadian, it features some bilingual writing. You can see how the printing on the OPC card is smaller to fit twice as much writing. They had to shrink the cartoon a bit, too, to fit both the English and the French.
I'm planning to pick up all of the O-Pee-Chee cards that feature Billy as a Cub. I'll post them as the arrive.