Alan,
I'm not qualified to say the Redding is "superior" for the pistol usage. What I can say is that the Redding microadjustable seating die I use for my .44 loading is of excellent quality (accuracy and repeatability as Mark said) and it sure is nice for someone that uses various bullets requiring frequent seating die changes.
It's difficult, as I'm sure you know better than I, to develop an accurate load, need to change the dies for a different load and then try to accurately replicate your previous settings for your preferred load. I seem to have darn gremblins that can make it difficult to duplicate a previously developed accurate load so I sure like to remove as many potential variables as possible. It's sure fun to develop the loads, it isn't fun when you get different results the next time around (maybe that's just me?)
Dan