The answer to 'difference between surge protection' is that surge protectors and lightning arresters are both devices used to protect electrical systems from voltage spikes, but they serve different purposes and have different features. Surge protectors are installed at the electrical panel or individual outlets to shield sensitive electronics like computers, TVs, and appliances from sudden voltage increases. Lightning arresters, on the other hand, are larger devices installed at the electric service entrance to divert high-voltage lightning strikes away from the home's wiring.
Surge protectors are generally less expensive, easier to install, and protect against common power surges from things like motor starts or grid switching. Lightning arresters are more robust and can handle much higher voltages, but they are also more complex and costly. Homeowners with a history of lightning strikes in their area may benefit more from a lightning arrester, while those mainly concerned with everyday power surges can get by with a good surge protector.