It is interesting how the specs continue to creep on the "lightweight" firearms. The original LCR in .38 weighs in at 13.5 oz and the new .357 3" is 21.3 ounces. That's nearly 1/2 pound!
I own two LCRs in .38, one 3of them in 3", and they are my go to carry and woods guns. Having said that, I also own a S&W model 60 3" in .357. Surprisingly, it only weighs 1.9 ounces more than the new Ruger LCR 3" in .357. Also as someone pointed out, the price keeps creeping up. So now, you can get a Smith mod 60 3" in .357 for a difference of $90 and 1.9 ounces in weight.