You probably should install fonts both ways even. The managing tools are basically needed to create some short path metadata for the related engines. As I've mentioned already, both systems are not fully merged yet. So you most likely have to install fonts which you want to use everywhere including Unicode capable MUI apps with both managers as it is now.
Applications which have extended character support automatically use TTEngine then, the "legacy" ones do fall back to FTEngine.
@cyfm - thanks so much! I will install them "twice" and see what kind of results I am getting. BTW - can I in any way help with setting up the new & improved font flow in MorphOS? I am an expert in fonts, but know not a lot about coding apps
If nothing else, I can provide all kinds of fonts for you to test with....
Mac Mini 1.25 GHZ, 1 GB RAM, MorphOS 3.17