Both! seriously though, I think the terrain you ride can partly help with your decision. Lots of rough rocky trails, go with the suspension fork. Smoother trails, but occasional gnar and short descents, go dropper. Aren’t you comparing products with pretty big price differences anyway? Whats the entry level price for a fat bike suspension fork? I would imagine at least double the cost of many dropper posts. Anyway, I am very happy with my Fox Transfer Performance post and Wolf Tooth lever. Its so smooth and easy to micro adjust, I find myself using it a shit load more than I would of imagined.