Well that's the only "major new feature" difference but certainly not the only difference. There have also been some bug fixes and lesser enhancements in V7 that weren't backported to V6. For example, I recently found a bug whereby restoring a partition image to an unlocked BitLocker target that had been shrunk since the image was captured (in my case as part of a Windows 10 upgrade) caused the restore to fail. Macrium fixed that in V7, but not in V6, since V7 was well into its lifecycle by that point. Keep in mind that Reflect 6.3.1849 was only released because it contained some important security fixes, but before that, its last release was in late June 2017. Reflect V7 has received several bug fixes and enhancements since then, which you can read here
if you're curious. Granted, some of those changes only pertain to V7 features (or even paid V7 features), and even for the bug fixes not pertaining to V7-exclusive features, it's possible that the bug doesn't exist in the V6 code base. Then again, it might. There's certainly something to be said for, "If it ain't broke, don't fix it", but on the other hand you may decide you want some of the lesser improvements added in V7, like:
- Better display DPI scaling support
- Warnings about a job that would restore formerly encrypted partitions onto unencrypted targets
- The ability to view the progress of a backup job that started while you weren't logged in
- Notification popups that include the name of the backup job to be run for at-a-glance convenience so the user can decide whether they may want to postpone it
- The ability to have scheduled jobs run as the SYSTEM account so you no longer have to store admin credentials with Reflect to run scheduled backups. The latter could cause scheduled backups to break if that account's password was ever changed and the user forgot to update the credentials stored with Reflect.
And speaking of Reflect 6.3.1849, if you're on Windows 10 1607 or newer, the security vulnerability fixed in that release was fixed even more effectively in the corresponding Reflect V7 update because design changes that had already been made for V7 made it possible to do so, and those changes would have been too much work to backport to V6. The mitigation for V6 is still quite strong, however, so I don't want to overstate this difference.