I have Barts in my Rics and find the tone to be a little deeper than with the stock p/u's (using the same strings as a comparison). You'll probably have to swap a few brands/styles before you settle on what strings you like best....the tone depends on your rig, playing style, effects, etc.
I use GHS Boomers and am perfectly happy with the tone and they are cheap (I swap them after every gig).I have had my '93 4003 MapleGlo since new and have no obvious fret wear.
Not exactly the info you asked for....but it can't hurt
