The idea is simple, 50% bigger planets when colonization slot 1,2,3,4,5 for the collector, and 50% bigger planets colonization slot 11,12,13,14,15 for the general.
If I see the nicely colored picture beneath, the max size for your colony on slot 5 being collector would be 348 fields.
For the General the max size on position 11 is 315 fields.
My is idea is to have more diversity in the solar system, instead of seeing only planets on position 8.
I am not sure about the added 50% percentage, the picture beneath is a little bit outdated.

