Are these plates compatible with the F38 system as well?
If you want to switch between F22 and F38 system, you need buy a accessory which named F22 & F38 QR Plate.
Are the release plates compatible with an arca swiss system?
No, it just can realize the function that convert 1/4" thread to F22 quick release system.
Does it comes with the anti twit pins? To make it like the arri anti twist things?
Yes. And it can receive them as well.