I've recently shot both a Sig P365 and a Hellcat. Being somewhat of a Sig fan, I wanted to like the P365 better, but it didn't feel nearly as good in the hand to me. I have long fingers, and the Sig feels too small for a consistent grip, like it wants to rattle around in my mitts. Both pistols shot low for me for some reason, but the P365 shot about twice as low as the Hellcat. Both of the guns shoot to POA for their owners so I'm blaming the low hits on my technique.
I also liked the Hellcat trigger better but then the owner told me he'd upgraded the trigger with an aftermarket one, so that doesn't count. I'll have to fondle one in a LGS and get a feel for the stock trigger. I remember trying a XDs trigger once and hating it.