The British fought in lines, and would aim, fire, and reload at the same time. They also wore bright red in the wilderness which were easily seen in the wilderness.
One flaw in this way of fighting is that they would leave themselves open when reloading at the same time, giving the opponents a chance for a surprise attack and them being vulnerable and not knowing where the shots are coming from.
The British were even helped out by the Iroquois. Although they didn't think they needed them at first, they were later allied with the powerful Native American nation.
The French had a much more "guerilla" fighting style that they adapted from the Native Americans.
Unlike the French, they relied much more on their environment as they used camouflage to make it difficult to be spotted and surprise attack the British.
Like how the British allied themselves with the Iroquois nation, the French allied themselves with the Iroquois' rival, the Horun.