Everything I've read (specefic to Jira) says that these are nothing more than issue label types. I understand the use of Epics are for efforts that span across multiple sprints and you need something to track those against.
I don't see any pro's and con's (in Jira) in using a Features vs a Task vs a Story? The question which was posed to me was now that we are agile and using the boards, what if I want to break items down into smaller sizes. Is it better to use a Feature / sub tasks, Story / sub tasks or Tasks / Sub Tasks. I don't see any advantage. Either way I go it appears I get the same functionality. Only the parent appears to show up on the board. (In other words you can't have children in any other sprints and you couldn't say assign a sub task to another team). It doesn't appear you can assign points to sub tasks to either types of parents? which seems odd. So other than the theory behind the meaning's between features, stories and tasks is there any advantage in jira in using one over the other?