Get the Redding or Forster micrometer seating die. Mine is Redding but chose the one YOU like best but get one. This will save you time and trouble when you change bullet styles, bullet weights, etc. You will not need to do multiple iterations to get to your final seating depth, Repeatability is perfect. Concentricity is as good as it gets.
The Redding Type S Full Length Sizing Die is the way to go. It does it all and does it as well or better than any die out there. It is a body-only die, a neck-only die, it does neck and body, it uses a carbide expander ball, it can size without an expander ball, you get to set the amount of neck sizing done to your cases by selecting the bushing diameter. Really, it does it all*.
I'd say, buy the two Redding does. Truly, either seater works but the Redding sizing die is the way to go.
* If I had one wish for Redding, it would be to develop a micrometer adjustable sizing die. One that adjusts the shoulder set back using a screw adjuster that does not require the coarse-threaded (sloppy) die body to be loosened to adjust the sizing depth. It would be great to just spin a knurled ring to adjust the depth.