That's just corporate speak. They are all the same. If you use RHEL after 5 years or after the .5 release, it becomes plainly obvious that it's begging you to pull the plug. It's only half assed security fixes after a few years, no matter where you are. If a customer asks for 13 years, I'm sure Canonical will oblige.
Edit: I'm talking about Ubuntu Pro that is 10 years.
Edit: I'm talking about Ubuntu Pro that is 10 years.