Entire PC vs. Disk and Partitions backups

I know many questions have been asked about this, and many pointers to the documentation have been given, but I still don't know how to decide between Entire PC or Disks and Partitions backups. This probably because I don't know how a disk recovery works.
I am running Acronis TI 2015, build 6613. I've got 2 PCs - one with 2 internal drives; the other with 3 internal drives.
I've never had to recover a drive before, so I'm not sure how this works. I realize that if I had to do a disk or partition restore from an Entire PC backup I would have to restore all internal drives, but I could restore individual files and folders from the backup. All of my non-C drives have less than a dozen files each. Big files, but not many, so recovery of those partitions, folder by folder, would not be a problem using either backup type.
Assuming I am backing up all partions (including the hidden System partition) on a drive with a Disks and Partitions backup is it any more difficult to recover a drive (or all drives) from a Disks and Partitions backup than an Entire PC backup? I assume the Linux recovery system allows me to specify which partions I want to recover from a Disks and Partitions backup. And I assume I will end up with a bootable system drive if I recover both the System partition and the C partition.
Are these assumptions correct?

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Thank you for your reply. I will switch back to Disks and Partitions backups (which I used prior to TI 2015).
My 3 devices (2 PCs, 1 laptop) all use MBR partitioning. (One PC doesn't even have UEFI support.) Even if GPT is more flexable (and allows larger drives) I don't think it is worth the effort to rebuild the laptop and PC that could make use of it.
BTW, I did not get notification that you nhad posted a reply to my question even though I had "Notify me when new comments are posted" checked. Is this function broken?
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