actually I got almost more than 75% drop rate off the 70/6 map for belinda myself but there was 1 account that couldnt do that map safely (only 2*, kept leaking) while the other needed black fairies so it was farming 40/3.
according to http://animalipartner.com/aigis/aigis-1133/
yes, the drop rates are the same; 27% for the 1st map that drops her and 50% for the G-tier.
anyway this event is pretty sick thus far. mainly the G-tiers. definitely not newbie-friendly.