Comparing 500-watt and 1000-Watt Ebike. There is a difference of 500 watts when you compare a 500w vs 1000w ebike motor and that difference makes a 1000w ebike more powerful. Let's see the major difference between them: A 1000-watt e-bike offers more strength and power as compared to a 500-watt e-bike. That's why they are expensive too.