Hello! I have Win PE, Bart PE, and a bunch of other live CD's seagate dos,Memtest86+, Puppy love, and more.
I have never seen the need to clone a drive and put it in a drawer. I have always just used a image. I guess a clone would get you back up and running faster, but I prefer having a image that's a month or less up to date. I don't use the incremental. I want the whole image backed up.
That's my 2 cents.
I have similar boot media in my kit too, Memtest, Gparted, UBCD, some others.
Cloning, that's why I do both since I like the speed with cloning. I'm using "hot-swap" racks in my Desktop PC so that allows for fast HDD cloning and swapping and also the Sata III transfer speeds help speed up the cloning process time.
The other reasons I like to have a spare HDD on the shelf is if I have a HDD failure or I'd like to test-restore a full-HDD image.
I had an occasion last week where I had downloaded a "suite" of things from Nvidia which installed things I didn't need which caused my Nvidia card to intermittenty crash when I was watching a streamed news broadcast show. My GPU didn't like the latest driver version for some reason.
Rather than uninstalling several things that got downloaded with that Nvidia package, I installed my cloned HDD. It was just a personal choice for me, vs uninstalling, etc.
I clone every couple of weeks. It's come in handy a couple of times in the past when I needed to restore from one of those malicious items.
I Image less frequently since it's a slower process for me (with a USB 2.0 external HDD).
I also prefer full-HDD imaging vs incremental or differential chains. I see the purpose in those approaches but since I have the Macrium free version, it doesn't offer those options.
Imaging is great as well since it offers storage versatility. I have a few full-HDD images of my 2 PC's stored on an external HDD as well as a family member's PC. They're good for redundancy and would be useful in the event I had a cloning failure issue.
I haven't encountered any cloning problems in 3 years since I began cloning periodically. I haven't been Imaging as long as cloning but so far, all of my test-recovery images have booted up great with no problems encountered.
I read about some problems elsewhere with cloning, ie "The copy of Windows is not genuine" blue screen message after cloning or other issues, but I've never encountered any problems with my Target HDD's after cloning on 3 separate PC's.