Collaboration with colonial authorities: Pitt gave local authorities control over supplies and recruitment, paying them for their help, while the French struggled to get manpower and supplies. The French were however better at recruiting the Indians to fight with them. A better navy.
The U.S. will increase with the a mount of technology that it has between now and 2025. The estimate growth will be a 3% jump to the future, but right now our tech is far behind schedule.
The liberation of slaves delivered a serious blow to the South´s economy. It was based on slave labor and it was mostly agricultural. There were no black men for harvesting in the fields.