I've owned both guns. I still own a G19 and love it.
My SR9c was an early-release model and had a lot of bugs. Further, the safety would chew up my left palm whenever I racked the gun with left-hand-overhand method. There were three other significant problems: light primer hits due to a too-short striker spring, inoperative manual safety and slide serrations (burrs) which cut my fingers. Two trips to Service and they fixed most of it; I fixed the safety.
I think Ruger Service was fine overall; they sent me mailing labels via email which I could print out and affix to the package, which made my mailing expenses zero. The turn-around time, in both cases, was about two weeks.
The SR9c is a decent gun. Nice and small, easy to conceal. I could put ten rounds into one inch @ 8 yards. But it had too many problems for me. Today's gun is probably is much better, now that the kinks are likely ironed out.
Please note that the SR9c is best compared to the G26 and NOT the G19. The G19 is 0.8" taller (grip height) than the G26 or the SR9c. A very large difference between the SR9c, the G26 and much taller and longer G19.
Something else you should know, as Glock.com "width" specs are misleading. The slide-width of the Glock 9's, .40's, .357's and the SLIMLINE model 36 are ALL 1.004" +/- 0.002".
However, the slidewidth of the SR9c is thinner, at 0.980".
The SR9c sitting on TOP of the Glock G26.
...and now the G26 on top of the SR9c
...and both together
...finally...a portion of my Glock family..
G26 on upper left, G19 on upper right, G17 lower lt, G36 lower rt..
NOTE THAT THE SLIDE-WIDTHS ON ALL FOUR OF THESE GUNS IS THE SAME...~1.004" +/- 0.002". Info that you see on Glock. com is the width of the FRAME, and NOT that of the slide.
Glock got the kinks out of their G19 about ten years ago or so, and it is the most popular Glock out of all of their models. It is my personal favorite for the range, although I carry the slightly smaller G36 in .45 ACP as it prints less through my t-shirt.
The G19 runs 100%...period, or at least close enough that you may never see a malfunction. I've owned twelve Glocks in four calibers and honestly don't recall any malfunction due to the gun itself.
I HAVE had stovepipe failures with reloads (SWC's), but of course these are NOT rounds which would have been okayed by Glock, Inc. Thousands of commercial rounds, i.e. RN, JHP, XTP, have run perfectly over the years.
Glocks are known to have slightly larger chambers, which greatly increases the probability of feeding a new cartridge. Some folks will also say that the decreased case-head support of the barrel may lead of occasional Ka-Booms, particularly in the higher-pressured .40 Smith models. I am not aware of any serious injury to either a Glock or a shooter who has had the misfortune to experience one of these.
I've had one of these buggers, with a buddy's gunshow reload in .40 caliber. It blew out the mag and got some carbon and powder grains on my fingers, but all I had to do was wash my hands and continue shooting...with commercial ammo this time.
Of course I would reco the Glock, and have many times.
S2