MainType does not know the IBM classification unlike FontCreator. However, this is an important selection criterion.
MainType indicates a pseudo-classification that is not really useful.
Example for Times New Roman.
Main type classification:
Serif.
IBM classification (followed by FontCreator):
Class: Oldstyle Serifs
Subclass: Dutch Modern
How can you still easily obtain this IBM information without spending days on it?
Thank for your explanations.