For clarity, the G19 is designed for use with 15 round mags and as such the manufacturer supplies 15 round capacity mags with the pistol. The SR9 is designed for use with with 17 round mags and those are the capacity mags the manufacturer ships with the SR9. The fact you can use mags designed for other pistols in the G19 or SR9/SR9c is immaterial to my original comparison that you quoted.
That's a polite way of saying "that's not fair!"
The mag capabilities IS a factor, and if for any reason along the lines of just having a crap ton of ammo on your person or you hate to reload, the G19 with 17-33 rounders excels. It was designed to flush fit 15, not end at 15.
As for trigger...meh for both. Neither excites me.
Safety on a DAO: Why? I'm getting a Shield, but I have no choice there either.
The Rugers priced a bit better, even less so than the Gen 3 G19.
Both have good after market.
But...if I'm buying a sub-$600 polymer framed gun for all purpose, truck, HD/SD, plinking, or leaving in a safe or drawer with a loaded mag for ten years and expect a dirty gun to save my life, I'm buying the Glock.