Intresting question! It is hard to know,though, since those nations were not independent, nor was the notion of independence even in the cards.
Here are some things closer to the end of the war that might have been affected:
- IOTL the French settled the "Isles Malouines" (Malvinas/Falklands) with French Canadiens soon after the war. If they win, they might not do it, since these settlers would have prefered to stay in Canada (as most Canadiens did IOTL even after the British took over). Would the English still settle in Port Egmont if the French don't establish a colony in port Louis? Would Spain still expell the English by force (bringing both nations at the brink of a war around 1770) if it doesn't have a colony of its own in the islands (the one the French established and later gave to them after Spanish protested before the French court)?
- What was Portugal's possition? Would they be weakened? If so, would these affect the military conflict between Spain and Portugal in the River Plate Bassin over Colonia do Sacramento in modern Uruguay?
- May a victorious France try to grab Buenos Aires from Spain ss the British did in 1806 or would their good relations with Spanish Court make this unlikely? Could Britain try instead, as a way to try to compensate for her losses?