I was waiting for the "It's like mechanical turk, but for x" moment, but it didn't come. Perhaps a gamification twist given the name? Nope, apparently same same but more flexible for the workforce.
So there are quite a few differences, the primary being the quality & spam problem that mTurk has. We have a number of quality assurance models which help us promise enterprise grade SLAs to our customers.
Moreover, mTurk is limited to requesters from a few countries. We don't have any such restriction.
Also, Our product enables us to stitch together multiple tasks to model complex multi-step workflows so you don't need to take the hassle of setting up multiple tasks and compiling their results. Playment just does all of that for you.
We've put up a comprehensive piece on this: https://playment.io/playment-vs-mechanical-turk