CuriousCamel for your case, the different versions of EaseUS Todo Backup don’t really make a big difference.
The higher-tier smostly adds features you probably won’t need here: Outlook email backup, email notifications when a job finishes, pre (post) backup commands, file exclusions, that kind of thing.
As for Disk Drill, it’s super simple. Just open it, look at the left-hand panel, and click on Byte-to-byte Backup. Pick the disk you want to image, hit Create Backup, then choose where to save the image file. That’s it.
Just in case you don’t know (which I doubt, but still) you’ll need at least as much free space as the full size of the disk you’re backing up.