Apart from appearance, there are two biggest differences. First, WB550 is 10 optical zoom, and WB 1000 is 5 times. Second, WB 1000 has full manual function, and WB550 is semi-manual. On LCD, the resolution of 3.0AMOLED of WB 1000 reaches 5 18400 pixels, which is better than WB550. In addition, WB 1000 is thinner and lighter than WB550 because of the smaller zoom of the lens. Other functions and performance indicators are not much different.