The FlashFish E200 and G300 are both portable power stations that can be used to power small appliances. However, the G300 is more powerful than the E200 and can generate up to 300 watts of power, while the E200 can only generate up to 200 watts. Additionally, the G300 is equipped with a larger battery that can provide up to 222Wh of power, compared to the E200's 166Wh battery.