You don't mention how you plan to carry.
If you plan to carry in your pocket, either will be a good choice. I have had a 442 for several years now. I love it for carry and it is the gun that most often comes with me when I go out of state (I can't carry in MD, the CCW is near impossible to get). At the range though it ranges from snappy to almost brutal depending upon the ammo used (.38+P out of the 15oz 442 is less comfortable than .357mag out of my 26oz Rossi 451 snub and magnums out of the Rossi are not exactly fun). The light weight that is uncomfortable at the range, and makes for slower follow up shots, is very helpful with pocket carry though: my 442 is very nice in my front pockets, my all steel Taurus 85CH is pushing the limits for pocket carry (though it is doable with a good holster).
I don't know how it compares in comfort at the range, but the Ruger does look interesting. Still, I'm not 100% sold on polymer for revolvers, but then, it took a while for me to be convinced on autos and now I love it (I have 4 polymer autos now and I'm in the market for another).
If you plan to belt carry or use an IWB holster, the low weight of the 442 or LCR go from advantages to disadvantages. The 20oz weight (+/- a few) of a .38spl snub carries quite comfortably in an IWB holster. If you weren't planning on pocket carry or just very occasional pocket carry, I'd go for a steel S&W 36 or 60 (or the Taurus equivalents) and sacrifice some pocketability for more controllable follow-up shots and more comfort at the range (more comfort = more practice = more familiarity and better accuracy with the gun).