What's the advantages to stitching 4/6 + Top/Buttom fisheye images in Panoweaver ?

If you only shoot 4 drum fisheyes, 4 full frame fisheyes or 6 full frame fisheyes horizontally and stitch them together. There will be obvious holes or seams in the top and bottom. In this case you may capture a top and bottom fisheyes and stitch them together, then the holes will be covered. Please look at Photography to see how to shoot top and bottom fisheye images.