I would sell the Ruger...
I like the K frame for carrying, but the L frame for high volume shooting.
I am not a 357 Mag kind of guy but I have owned some Mod 19/66's.
2.5, 4, and 6".
Just today a buddy and I were shooting rifles together. He had just bought a 4" 686 from another buddy. He knows I am a S&W revolver kind of guy and tole me to take it home and check it out, as we will be shooting again together in a couple of weeks.
With its under lug 4" barrel it feels like it will be a good shooter of 357 Mag loads. It really does not feel that much bigger and bulker than a K frame.
But remember I most often use N frames....
But I do like the feel of the L frame...