Simple Deluxe Submersible Aquari... vs hygger Small Aquarium Betta Heat...

The displayed temperature is within 1 degree as verified by my calibrated thermometer. Easy to set up and control. I like the fact that the main body is titanium because it seems they hold up the best.

The suction cups are very strong and easy to attach securely to the wall of the tank. The heater is just there for comfort. The cable is thicker with hygger, so that's more comforting.

I am very surprised and disappointed.