Picking a Sixth Form

I am very indecisive about what sixth form i should go to. School A is a different school to my secondary so it would be very new to me which I like and there would be new people to meet as i go to School B is an all girls school however I know quite a few girls from School B going to school A so i would still feel comfortable. Yet School B (the all girls school) scored almost double the percentage of grade A and A* then School A. I honestly cant decide and its so hard to come to a decision if anyone has any advice or any questions please let me know.

School B - the only thing that matters is your grades. If studying at a familiar school with familiar teachers and students will help you study better than choose it.
Ultimately, the grades on results day depends on you, not your teacher. Your teacher can only push you to work harder, or make you understand something better, but you need to take the initiative in your own learning. Sure, some schools are more supporting than others - it just means that less students are supported, but students still make full use of their teachers (asking for help after school).

Thankyou so much for your advice

How did they do in the subjects you want to take? Overall percentages can hide poor departments