I have the Lyman Gen 6. Its ok, the touch pad is best done with a stylus.
Its reasonably accurate and you don't have to tune it (Horandy)
I tend to use it for my establish loads as it ranges +.1 or -.1 variation.
What I don't like is you punch in the load, and you have to know what it is as there is no indicator saying whats in the machine. No matter where it comes to rest there is no out or range signal.
Nice basic machine. I am not sorry I have it, but its kind of a mixed thing
I don't have an RCBS so I can't comment how it compares
I do have a Hornady and it has some nice feature like a bleep when done and the load is on (green light) or a double bleep and a bad load. When it works its accurate to a grain (as set)
It has some tuning issues and fails to hold values when you reset a load so its also irritation in a different way.
I have learned what numbers to punch in to get max speed.
The Gen 6 and the Hornady are about equal speed wise. Gen 6 faster sometimes but less accurate (if you are in a wide enough node it makes no difference.
I don't know if RCBS is any different in that regard, ie. has annoying features though I believe when programs it stays programed.
I sure do like them though, both were on very good sales in the $140 to 160 range.
I tend to run both at the same time, as most trail loads are 4 tenth different (sometimes 5) its variation is not an issue.
The Horandy has little buttons that are a bit hard to punch with my fat fingers.