Also, a big welcome to the board JBoy. You raise some interesting questions and as a dyed in the wool compact disc junkie, I have different versions of several Blue Rodeo albums but the "different" versions are mostly either Canadian imports or U.S. versions. WEA was Blue Rodeo's label for most of their Canadian releases, and the 1995 Discovery label "re-issues" were primarily released in the United States to the best of my knowledge. I call the Discovery releases re-issues, because Blue Rodeo's first four albums, namely "Outskirts", "Diamond Mine", "Casino" and "Lost Together" were released in the U.S. on Atlantic Records and to confuse things even further, some promotional singles from the album "Casino" (most notably "Til I Am Myself Again") were released in the United States in 1990 on Atlantic Records' subsidiary label East West America! Again, to the best of my knowledge Rhino Records has never released any Blue Rodeo albums, so I think that whoever wrote the product descriptions (especially if it is on Amazon) may have just lumped WEA together with Rhino, probably because they are both subsidiary labels of Warner Bros. Records.
If you are concerned about sound quality, I have the Discovery label cd "re-issues" of "Outskirts", "Diamond Mine", Casino", "Lost Together", "Five Days in July" and "Nowhere to Here" and the sound quality on all of them is excellent. If you can get your hands on the now out of print Atlantic label Blue Rodeo albums, I think you'll hear no difference in sound quality as compared to the Discovery label albums either. By 1988, compact disc recording technology had improved from the early days of analog-digital transfer. Heck, even the U.S. Atlantic label cassettes of "Outskirts" and "Diamond Mine" still sound pretty good. So to my ears, I hear no discernible difference between the Atlantic and the Discovery versions of the aforementioned Blue Rodeo records. I can't say for sure, but it appears that the master tapes were used for both the Atlantic and the Discovery label versions of these early Blue Rodeo albums.
Someone who was in the studio during the various recording sessions would know better than I regarding use of the master tapes and on which label, so I open up the floor to anyone who can add anything to this rather interesting discsussion. In the mean time, happy hunting for those early Blue Rodeo releases...on whatever label.