I have both of these sets and am long overdue to revisit them, though I think I did play the Brown box through again a few years ago. My distant recollection is that it seemed to be a lot of each particular artist at first, but not so much that I regretted buying either set. I've got a soft spot for the club blues sound, so I've probably taken the Brown down off the shelf more than the Milburn over the years (though "In The Middle Of The Night," that's Milburn, right? Damn, that's a good one... he did club blues too). Some might be content with the two excellent compilations that you posted above, drawn from the same body of work.