[Andrés]

The difference lies in the balance of planet sizes:

In stock all sizes have the same multipliers except huge that has nearly twice, so balance of planet sizes depends mostly of sector types.

By forcing so many tiny, small, and medium planets and relatively less huge ones FQM alters that "balance".

Forced huge-gas planets compensate this for gas dwellers (slightly overcompensate actually), but non-gas huge planets become relatively rare and that is the only size in which ice is as common as rock and where ice dwellers found most of their facility slots.