The main difference with our springs quality is the bounce. They are softer springs so they stretch farther when you bounce, which results in a smoother rebound that is spread out over a greater distance. Softer springs experience more stress when they are stretched, so a higher quality steel material must be used to withstand this stress. Other trampoline companies use softer springs with lower quality steel which can permanently deform when used. Our high performance springs not only last longer but they feel better.