I have a Mansom Supreme (they make other anchors so I a not certain that this is the one you are referring to) and have been very pleased with it. On the other hand, one big advantage of the Fortress is lightness, including the fact that they do not recommend a great deal of chain be used with their anchors. They are good anchors and the light weight is a consideration.
If you plan to use an anchor roller make sure that the anchor you want to use will fit nicely on it. One advantage of CQRs and Bruces is that they fit on rollers well. With some of the others you have to experiment to see.
Back in the water in Grenada - with new main and #2 and cockpit canvas (Santa came early). Will spend the winter and early spring in the Caribbean and then head to Bermuda and the northeast US. Still trying to decide if we will bring the boat to Canada, either in 2015 or 2016.