Changing from ReadyNAS Pro to RN31400

For various reasons we're looking to update the ReadyNAS Pros (2) we've been running on for the past five years. The capacity of the ReadyNAS Pro was always overkill for our purposes, so I'm looking at the RN31400 as a replacement. I wanted to confirm that in making this change I would not be losing out on any functionality that I currently have with the ReadyNAS Pro and would not have with the 31400?

If not, will I gain any functionality?

Is the 31400 loaded and compatible with the Egnyte NAS Cloud Add-On?

Thank you