The main difference between Laguna Fusion 2 and Fusion 3 is the motor size. Fusion 2 has a 1300w motor, while Fusion 3 has a more powerful 2200w motor. Additionally, Fusion 2 has cast aluminium cabinet mounted trunnions, while Fusion 3 has cast iron cabinet mounted trunnions. When choosing between the two models, consider your specific needs and the level of power you require for your woodworking projects.