I made a discovery yesterday: Canadian Coca-Cola is different from the US version. A bit of web searching revealed that this is not new information, for example this article.
Same size, 355 mL, but in Canada sweeter with 160 calories versus 140. The “Nutrition Facts” labeling (“Valeur nutritive”) reports 42 grams of sugars per can in Canada and 39 grams in the US. Oddly 8% more sugar yields 14% more calories? Or equivalently 3.8 calories per gram in Canada versus 3.6 calories per gram in the US? I’m skeptical…