Square set plasterboard type

[Ardep]

For squareset should I get sheets with one edge square or both recessed?

[Beardy]

Sheet sizes and availability is usually limited with one side not tapered board and the sizes are aimed to suit commercial fittouts and I think it is dearer too.
I cant recall ever seeing it being used on domestic work as the requirements vary too much. Your setting bead works fine in all scenarios whether you have a tapered or square edge sheet end regardless