In practice, if the replies dry up after one message the answer is usually to move to a proper conversation quickly rather than test two platforms at once. In practice, the bigger platforms have changed the matching order without saying so, but only if you stick with it.
If you are after something serious, read the last few pages of a thread before asking — it filters out the time wasters fast. What changed my mind was that the free tier matters massively more than the matching algorithm, but only if you stick with it.
Going by my own attempts, the verification step is the thing that decides it, despite the fact that the older established sites rarely say so. What changed my mind was that the daily match cap matters a little more than the photo review, though it depends heavily on where you live.
In the same vein, Datelink's messaging setup does more than most for anyone after something slower, so it is worth a look.