I have a Taurus M85SSUL I carry a lot, carrying it today. It has the best out of the box trigger I've felt, but I haven't handled the excellent LCR, yet. It's way better than the J frames I've tried and fired. The Ruger's trigger design, from what I've HEARD, really gives it a superior smooth feel. I'm not disenchanted with my Taurus, though, far from it, and am not in the market for another pocket revolver. I love that thing, accurate, smooth trigger, rugged, compact.
One thing about the .357, if I had an LCR in that caliber, I'd only shoot .38 in it. Now, I'm an experienced handgunner, handgun hunter, have a TC Contender with some powerful rifle caliber barrels, know recoil and can handle a good amount of it. But, I've fired a 12 ounce J frame with a hot .357 and, well, that's okay, pocket revolvers work best with the .38 IMHO. Also, consider recovery time for that second shot. Nope, I'm not into .357 in light weight revolvers. That said, like I say, I've NOT fired the LCR in particular and the grip on that gun might soak a bit of it up compared to a J frame. I'll let other folks experienced with the gun give that info. Just thought I'd weigh in on the 13 ounce gun in .357. I'm not a customer.
If the price is the same as the .38 version, though, and there are no other compromises, hell, why not get the .357? Don't have to actually FIRE .357 in it, eh? I won't pay a scandium price, though, when I can get an alloy +P .38 for half that. Some will opine that the LCR's plastic grip frame would make it too fragile, but the grip frame doesn't have a thing to do with the ability of the gun to handle .357 pressures. It is not a stressed part of the handgun.
I often carry a small auto, 9mm Kel Tec, and it's very reliable and practical for pocket carry. But, I do understand your concern for reliability and revolvers tend to be jamless if nothing else. I've had 'em break, a model 10 with a cracked forcing cone and a Rossi .357 with a busted firing pin. Those breaks were worse than a jam, put the gun out of action, but they truly are the exception rather than the rule. Autos DO need to be tested with carry ammo, though, lots of it, and that can be costly to find an appropriate load. Revolvers only need a few rounds fired to test accuracy, then you can carry the load. I'm a revolver guy at heart, can relate to your concern here.