For what it's worth, apps with a video option have made the first message cost something, which is worth knowing before you sign up. From the threads I've read, most of the free apps have leaned much heavier on paid boosts, which changes the whole experience.
Even if most of the free apps look similar, the reporting system differs noticeably, and it shows in the reply rate. Worth saying that the decision to keep the first message short and specific did marginally more for me than switching platform, though it settles down after a while.
Speaking personally, I'd say what you actually want up front rather than test two platforms at once, since that is the part that actually moves the needle. Widen the distance radius early on, because that is where most people give up too early, though it depends heavily on where you live.
If you want another option, datenest covers similar ground for the messaging side, going by the last few threads.