I think the peckers hook more. They both work good, I seriously doubt you couldn't use one where the other works. A5 and hurrcane beaks aren't made anymore so BD is the only good option that I know of. I want some of there bigger beaks, those things could make a sketchy blade placement into something that could hold a massive whipper. The old option was to get specters and file them down, which I never wanted to do cause the cost.
You can modifiy beaks a bunch for tricky stuff, like bent them to fit in corners, file them to slam into thin stuff, drill holes in the head to tie of for roofs. Whatever you want, just buy whats cheap.