I have never used partitions, so, take this with that knowledge
I did hunt south africa with a PH that has hunted all over africa and specialized in dangerous game for his early career, and moved over to RSA to have an easier time after he had kids. I trust the opinions of the been there, done that PH's, since they hunt 10 months out of the year and has seen thousands of animals get shot.
He HATES partitions; and does not understand why the Americans bring them. He claims more plains game is lost to partitions blowing apart than any other bullet. He prefers the a-frame or a solid copper bullet and says they perform much better on game consistently.
The design is to "mushroom" on the front (but they seem to tend to blow apart) and bring a small back end through the animal. When I look at them I also wonder why anyone would use them. Swift A-frames are a similar design but don't blow apart the front half, they mushroom and hold nearly all of their mass. IMO that is a far superior bullet when looking at cup and core.
I was in alaska recently and the guys there all guide moose and brown bear. They really like the accubond as well and says they perform very well on moose. I shot the caribou in my avatar pic with a 160gr 7mm AB, went through both shoulder blades and the bull took one step and folded. The bullet did exit, but there was also quite a bit of meat damage and a lot of tiny shiny copper fragments in the meat. The AB worked great, but i have a box of 150gr ttsx to play with next, as I really like the idea of close to 100% weight retention.
Moose are big animals, you may not get a broadside shot, i would opt for solid copper or an a-frame. I have a goal of canadian moose hunting in 2 years with my 338RUM, and i will likely load up with 210 ttsx's and push them fast.