Looking for the best upgrade path from NSA2600 to NSA2650
Our current firewall is a NSA2600 running 184.108.40.206-23n, We have a newer 2650 running 220.127.116.11-42n. It made sense to me to get our current 2600 up to the same version in order to migrate the settings so we know there are no compatibility problems. The issue I am having is the releases seem to be all over the place, I just want to know the best way to get the 2600 upgraded. Should I jump right to 6.5.0? or just go right to 18.104.22.168?
The other thought I had was should we upgrade them both to 22.214.171.124-83, which seems to be the latest general release, then transfer settings over?
Thoughts and best practices would be appreciated on this situation, thanks!