Comfort is definitely personal, but I'm with Freewillow. I always dive a 7mm in Anilao (Mar, Jun, Dec) and am sometimes still cold. Factors to consider - depending on who you are diving with
1. Long dives without much swimming (80 min + common unless your op has a time limit) and up to 4 dives a day
2. Many ops do 2 tank trips in the AM so you are sitting on the boat in your wetsuit for the SI which I find makes the next dive colder. Yes it might be sunny, but it can also be windy and wet neoprene still bleeds body heat. Some ops also do a 2 tank late afternoon + night dive.
3. Ops who care about night dives usually run epic night dives, which are also long and slow. I usually do daily night dives in Anilao and find my core temp is often lower after multiple dives on multiple days.
Whatever you decide on, I suggest you also bring a hood or hooded vest. Always better to have it and not use it than be cold and wish you had it. I usually find I am wearing at least 2mm more than male diving guests, but of course every body is different.