Both of those are solid picks with a past pro-Second Amendment view and who were confirmed to their appellate seats unanimously by a Democratic Senate, so it will be hard to now argue they are some kind of right-wing nutjobs.
Gorusch also is rated "unanimously well qualified" by the ABA. My only gripe with him is I think a SCOTUS comprised entirely of Harvard and Yale grads is completely out of touch with the rest of America. But that is a minor gripe, and its not like Hardiman, who is a Georgetown grad is going to dilute that monoculture much.
I think Gorusch will be easier to confirm; though of course all the past accolades by ABA and non-opposition by a Democratic Senate will be memory-holed if either candidate is nominated.
ETA: Hardiman wrote the dissent in this opinion where he argues that New Jerset's "justifiable need" requirement for a concealed carry permit violates even intermediate scrutiny (if that's too much legalese for you, suffice it to say that view would be a major shift in the right direction on the Second Amendment):
http://caselaw.findlaw.com/us-3rd-circuit/1640513.html