This has been more helpful than anything I found searching for facebook dating app, mainly because how you use it matters more than which one.
The visible activity level matters far more than the feature list, at least in my experience with facebook dating app.
How you use it matters more than which one, and that applies to facebook dating app as much as anywhere.
If we're talking i use the facebook dating app effectively, persistence matters more than the choice.
My read on i use the facebook dating app effectively: the platform matters less than the approach.
For contrast I also tried Luvdate; different approach to facebook dating app, worth comparing.