The Sigma is not in the same class as the Hi Point. The Sigma is better.
I have one.
Anyway, there's more to the 9mms that wasn't told. They have different trigger systems. Single action only, double action only and SA/DA. I'd get the double action only (for SD.) Safe to carry with a round in the chamber (like the revolvers) and some don't have external safeties but the trigger safety itself.
I have two I keep for SD and they're both DAO with no external safeties, my Sigma 9mm and my Sig P250 40sw.