9mm 124 +P v 147 v 300BLK 190gr

[Sugar]

Hey experts,

Looking for some input on duty/carry loads. When I work OCONUS, I've always been issued something like a Speer GD 124 +P or the HST and Winchester Ranger equivalents. So I've always figured those rounds were safe bet for personal purchase here at home. But being home, I have more options that I have at work so my questions are:

1) In terms of 9mm, which performs better 124gr +P or 147gr? Does platform dictate (handgun v PCC)?

2) What would perform better ballistically in an urban environment: Some type of K sized PCC loaded with 124 +P or 147's or Sig Rattler with Hornady 190gr SUB-X?

I have a Sig Rattler that I just picked up some of the SUB-X for but I have no way of testing velocities or terminal performance. I'm wondering if an MPX(k) loaded with some type of 9mm would perform better. FYI, both running suppressed.

Thank for your time!

ETA: Platforms in use are the SIG MPX 4.5" (9mm), SIG Rattler 5.5" (300BLK), and Glock(s) (9mm). Rounds considered are Speer Gold Dot in 124 +P and 147 & Hornady SUB-X 190gr.