I believe once you shoot the two, L-Frame and N-Frame, you'll find the L-Frame to be the winner. It's cylinder is a trifle bit longer so you can use the heaviest of bullets without their protruding from the cylinder face. And I believe you'll find the L-Frame the perfect size for the .357 Magnum cartridge.
I've gone through K- and N- framed Smiths, Colts, including the vaunted Python, and, to me, the Model 586 is the very best .357 Magnum double action to come out yet. Though I must say I've no experience with the Ruger DA revolvers.
Bob Wright