This is just a quick comparison for an Ancmed member who is wondering about figure compatibility.
Xyston Persian command centre and left; Essex on the right.
From the rear. Xyston figures are chunkier, but I don't think unreasonably so.
The horses: Xyston slightly longer, but the height is about the same.
Some more from different angles.
My conclusion is that they'll go together fine - especially being well-fed and caparisoned commanders - but I'm less picky than some!