1. Appearance: se size 28 cm, 0.4kg, s 2 size 32 cm, 0.6kg. Because s2 scale is bigger and heavier than s2, it has four balance stickers at the bottom, so it is more stable.

2. Function: se weighing scale can weigh body weight, body fat and display temperature. S2 can weigh body weight, body fat, display temperature, connect Bluetooth to download keep software, and analyze daily body fat changes. So s2 is good.