What feature F5 have but radware doesn't have?

Devcentral? :P

 

Unless you find someone that worked with Radware before, you will probably only get the F5 part from devcentral.

 

Have a look in this page, including the pdf documents:

 

https://f5.com/products/big-ip

 

Also, the Gartner report is a good source of information. Check the Application Delivery Controllers 2016.