The Sig is #1 for me. I had a friend who tried the Hellcat first and dumped it to go to the Sig after he tried mine. You do know that the Sig is modular? You can buy a P365, P365X or P365XL......or just get a regular P365 and replace the grip module. Wilson makes a good one and there are a couple other options as well. Yes, the trigger is great and the accuracy very good once you get used to the 'snappiness'. There are videos of guys hitting steel at 50 yds.I love Ruger and Sig products and was almost set on the Sig but grip size matters (that's what she said).
You should go rent and shoot both...but there is a reason that the 365 is the best selling pistol.....just my .02.