I don't have one...yet...but am getting one soon enough. A nice R8
Really, if you want a vintage sounding LP, you go for a historic. That's what I figure and that's the reason I want one - your reasoning may be different.
I'd say a historic IS worth the extra $$ because Gibson reserves their finer & lighter woods for the RIs. The guitar is a true solid-body with no weight-relief (whereas regular Customs are weight-relieved), long tenon, CTS/Bumble Bees and of course, BurstBuckers...but if you sit down, play it and don't like the feel/sound, than all these goodies are of no use to you, right?
Truthfully, I'm not too familiar with the historics. I've played a few acoustically to get a feel for them and have only plugged in one R7 into an amp. The R7 was a big disappointment, to be honest. It sounded bland and the tone knobs were basically useless - the tone was either on or off with no sweep. Apparently, this is typical of CTS pots - having no sweep - but I didn't know that until after I played the R7 when somebody on LPF told me. I still need to verify this for myself by basically plugging in a bunch of historics.
This hasn't persuade me from buying a RI, I just have to find the right one - and by that I mean one with a wide sweep. I know the simple answer would be to just replace the pots, but I don't want to modify any of my guitars. So, if you're looking for a guitar that allows you to ease the tone back to 6, a historic may not be the right one.
Now having said all that, I absolutely LOVE my 2007 Custom, which is not a reissue. She's just under 10 lbs, has a nice thick neck...not baseball bat thick like a R8, but much, much thicker than a 50s profile, and the widest and wildest tone range than any of my others! She sounds like two guitars in one...I absolutely love it!!
Sorry, I kinda went into left field there.

Did I answer your question?
Edit: Well, since I am already in left field I'll tell you a short story.

I put up my old amp for sale recently. An old timer around 55 years old came over to buy it. I asked him "What guitar do you want to play? I only have Gibsons." He said "Give me an older one 'cause new ones are junk." So, I thought OK, you're getting my Custom. He played it for around 10 minutes and then asked me if I was selling the guitar. Put a huge smile on my face. He bought the amp.
Basically, don't think the RIs are really better than the non-RIs - they're just different. It all depends what you're after.