Which is better, Autes or Preston?

Hello, I want to ask which is better, Otis or Preston? The air in Preston can be better.

1, Preston air energy water heater mostly adopts microcomputer intelligent controller, which has many intelligent control functions such as time setting, time on-off function, water temperature setting, ventilation setting, overheating protection and so on.

2. Zhongguang Otis air energy has no restrictions on installation conditions. It is safe to use, and no electrical components are in direct contact with water. But it has few functions and can't have hot water in time. So the air in Preston can be better.