Hey there mate! While similar in profile the blades are actually quite different.
-The sirupate is a simpler blade in terms of shaping and grinding. The mutiny tapers more strongly, features a strong spinal fuller as well as a hollowed out and leaner grind. This accounts for the weight difference between the two.
-As a result of this the mutiny has a more refined feel in hand and will bite deeper in chops as well as slice through material more readily.
-In general the blades have a similar amount of chopping power and a lot of overlap in utility. However I'd say that due these other factors the sirupate is more suited to a rough and ready camp/yard role. If you're going to be doing a lot of prying, batoning, log splitting, clearing brush around rocks and fences then the added beef will give a lot of comfort and ease in use. It pairs well with a full tang, particularly at 16" and up. The mutiny can handle all the work described aside from heavy prying but asks for a little more care and a sensible outlook. In return if offers a lot higher cutting performance and a more exciting feel in hand. Both blades obviously have martial capabilities but the mutiny jumps ahead in this regard.
Take care,
Andrew and the team at Kailash