My older SP101 is a work of art .
Treasure it then, because it is the outlier. I've been fiddling with them since the late 90's and I have yet to see one that didn't benefit from reliving sharp edges in and around the trigger-guard, knocking the edges and tops down on the hammer checkering and turning the barrel up square to correct windage errors.
This is not to say they are bad guns. They are splendid little .357s and in their niche, nothing else quite compares to them.