The only comparison I've made has been the RVG vs. the regular older Blue Note CD reissues. The Blue Note reissues in question were ones first released in the late 1980s--a century ago in digital terms. I'd say the RVG CDs are noticeably better. The sound is cleaner, and there is more detail. But, the difference isn't as staggering as the difference between the RVG CDs and some other late 80s CDs. The older Blue Note CDs aren't as good as what can be done now--but from what I can tell, they were done well for the time, and are probably better than some new, poorly done CDs.
I might add that one thing that I like about the RVG CDs is that they are high quality CDs at "regular" CD prices. Rather than being a fancy "audiophile" reissue at two, three times the price.