Mojave APFS is not different from High Sierra APFS. It is the same file system with the same features. The logical structure of a Mojave APFS volume is strictly the same as a High Sierra APFS volume.
If something evolves, it is only the performance of the "engine" behind APFS, not the functionality. And because it's a very new file system, no doubt that Apple is trying hard to optimize it to speed up read/write operations, among other improvements and bugs hunt.
I know ApfsDriverLoader-64.efi and use it from the beginning, but that has nothing to do with my initial question.
For your information, boot time of my Skylake rig has doubled from Sierra HFS+ to High Sierra APFS. I know boot time is not essential, but in some manner, it reflects the performance of global volumes access.
I am sure Apple, in the near future, will improve APFS performance, and not only for Mojave users... In the meantime, all workarounds are welcome!