ESP directories to use when dual booting 2 distros from same vendor?

I have installed factory and which created the directory: /boot/efi/EFI/opensuse

I want to install (dual boot) openSUSE 13.1. However, (I think, not yet having tried the install) doing so will wipe out the existing factory directory of /boot/efi/EFI/opensuse and replace it by a similar named directory based on openSUSE 13.1.
This problem is discussed in bug report:

The suggested solution I like is to create 2 subdirectories e.g.

Is there anything else related to this I should be aware of?

Also, is there anyway to keep openSUSE 13.1 from running “grub-mkconfig” during its installation? I would prefer to run it in factory.

My suggestion:

In your factory system, get into Yast bootloader and reinstall grub2. As you do that, go to the options menu, and change the “Distributor” line. In particular, change the “openSUSE” to “factory”.

That will switch your factory system to use “/boot/efi/EFI/factory”, and the boot item will be called “factory” (or “factory-secureboot”).

That will leave the “opensuse” name available for 13.1.

This works. I’m using it. Actually, the names that I am using are “opensuse” and “betasuse”.