When is it best to use Off Mesh Links and when is it best to use Nav Mesh Links? Do they work better/worse for different situations?
I believe you're referring to automatic off mesh links versus manual off mesh links? If so, I find that the manual links just allow for most customized placement. With automatic links you may have 20-30 links across the end of a platform allowing an AI character to traverse anywhere along that edge, but I think it's unnecessary to have so many. So having a manual link system helps with that. Would be nice to have some options with the automatic settings.
*Edit* I understand what you're referring to now. The "Nav Mesh Links" are the updated version of the off mesh links within the new Nav Mesh system. As far as I know they are not better performance wise from what I've seen, but they do allow for it to be used with a custom agent.