The Mengs plate is the Sirui very similar. However, it is slightly less deep and has a little lay edge to prevent rotation. She has as the Sirui 3 tracks for the camera screw, but is due to the larger outside diameter of the U-bolt in any case only the middle lane available. And the Mengs plate missing the two bevels for the safety pin of Sirui heads. Because the C-10X but anyway has no quick release for the pin, you have to insert the plate from up here. So that bothers most of the larger Sirui heads when there will push the plate side.
For half the price of the Sirui plate to get the clearly more comfortable drive here.
4 stars because of the ever ausklappenden Bügelschraube, otherwise full purchase recommendation!