Each type has its pros and cons. You should research and find the one that is right for your needs. Number of ports: The number of ports in the protector that you choose should be informed by the devices that you are looking to protect.
If you are looking for a protector for your home appliances, you can go for a protector with many ports, but if you are looking for a travel protector, go for a protector with a few ports to make it easy for you to travel with it.