I don't think you can go wrong here.
The Ruger has a bigger following and looks pretty cool, but the ease of takedown tips the scale to the Smith for me, I have one on my list this year. You can drive tacs all day long with both of these guns, lots of fun.
You won't go wrong either way.
SD, no hype, kooi-aid, marketing expenses or extra backstraps to pay for, just American perfection!