In 1745 During King George's War - the French burnt out most of the Settlers in Western Pennsylvania & New York,
Rot the next several years the cities of Philadelphia and New York were full of Refugees. However by 1749 and the end of the war, All of these returned home with Thousand of New settlers.
By 1757 and the French Indian War, there were to many Settlers in the area to allow the same tactic.
During the 1700's while Emigrants were arriving in British America by the Boatload, France was busy imposing Restrictions on Immigration to French America..
France never developed the population Base need to hold North America.
Even if France had keep Quebec in the 1760's, She would have lost Quebec in the 1770~80's war.
There is no 1770/80's war between France and Britain except as a participant as ally to the American revolutionaries...as said previously, this probably will not occur, and probably no run down in the French treasury as a result as prelude to French revolution.
So as stated, There is not likely to be the same dynamic as OTL though colonial rivalry would still exist...This would largely centre on the Caribbean for the most part and New England/Upstate New York and the Hudson Bay Basin on the continent. Assuming of course that Louisiana had still been given to the Spanish Bourbon's for safe keeping of course.
As to population... English settlement would still exceed that of the French...but in the latter years...the French court had actually started encouraging more settlement. If they had retained New France.. the prohibitions on westward settlement would probably have had to be lifted to allow them to project their influence effectively into the Upper lakes. Settlement probably would have continued to be encouraged. probably in frontier settlements at key location in the upper country.
Ft. Frontenac, Rouille and Detroit for sure. Whether the Ohio could be retained is debatable its too far from the St. Lawrence access routes. Michigan peninsula perhaps the Illinois country probably should go with Louisiana to Spain in this case, for safe keeping.