The Hex Crimp F connector is an inexpensive and easy to install connection for RG-6 and RG-11 cables.
However a Compression F connector has much higher performance which is important for Digital TV and HDTV systems. Compression F connectors are also easy to install and only cost a little more than Hex Crimp connectors.
NOTE: Never use a knife or pliers to install a connector. The result is picture quality issues.