I said that the sound is better than the "Live in Europe" LP. I meant the original LP, which always had lousy sound, even though the music was great. The remastered version of "Live in Europe" (I have it on the "Seven Steps To Heaven" box) is a huge improvement.
On the original LP, the drums sounded off-mike. Since Columbia did not record this, but acquired the tapes from whoever did, I always assumed that this was the best they could do with what was provided to them. When I first heard "Cote Blues", most likely from the same source, I wondered why Columbia had not issued this set instead, since the sound was better. When the remastered version of "Live in Europe" came out on the box in 2004, I figured out what must have happened. Columbia must have figured that the drums were too loud, and re-EQ'ed the tapes to lower the drums' volume. Remember that before "Live In Europe" was issued, the world had not yet really heard this band with the dynamic Tony Williams in all its live glory. It turns out that the source tape for "Live in Europe" was fine, it was just butchered in the process that led to the LP.