Both of these advertising platforms are really powerful and both you should treat carefully. They are both worth trying.
However, I find that Facebook is easier to manage. It's easier to set up (personal experience) and not only you would get leads, you would attract lookalike audience too. One friend liked your page or post, maybe commented it - then Facebook showed that to other friend and so on. And generally, I find it easier to set up, change, it is more simplified comparing to Google ads.