Toyota released the 3s-ge and 3s-fe and the GE always had a better power curve, making more power as well. Obviously different engines are going to behave differently with different heads but as far as I ever learned, FE heads were supposed to made for a more mild fuel-efficient engine. Why else would Toyota use GE heads on their Rally Cars and GE heads on the Supras, which were made specifically for performance when they were split apart from the Celica Supra. Did I mention Toyota paid Yamaha to design Toyota's GE heads?