Each of those manufacturers make their different lines.
As with MOST things, the better quality item will be the more expensive item. Not always, but most times.
As far as rating the 3 you mentioned I personally would rate them in the following order:
1. Redding
2. RCBS
3. Hornady
I will admit I have not used Hornady dies, but I have used both Redding and RCBS as well as Lee and Pacific (Pacific is now owned by Hornady I believe)