I have both RCBS comp and the Forster comp and add in a Lee sedater I was given.

I like the Forster large head micrometer die, its precise and easy to set, more accurate than the RCBS but RCBS does fine.

I don't use the expander plug in the dies, as all my stuff is variation on 30 caliber, I have an Lyman M die and do the neck expander after sizing (expander are cut off or removed, some would not come off so they got cut off)

The M die feels a lot easier on the case head, I think its the way to go though another step is annoying. but its like the pistol crimp end, separate crimping step was better overall.