I use both.....
In fact I have 1 older "ohaus" scale, 2 "RCBS" 5-0-2 scales and a "J Mack" Precision 20 digital scale.
I could probably get by with one or the other, either the 5-0-2 or the JMack 20... But I always seem to 'check one with the other'...... I just gotta make sure it's exact! (thats the OCD coming out again!)
The Jmack does seem to have a more "exact" reading.... And it's about the same price as an RCBS 5-0-2.... If you can afford both, get both. If you can afford one, get the 5-0-2.
Cheers!