Canadian LP pressing, how good?

I think it is pretty hard to generalize, and you have to take it on a case-by-case basis. In my experience, the quality of the vinyl used in Canada in the '70s was probably higher than that of the U.S. But, if the album was first mastered in the States, the copies made in Canada were probably made from a later generation copy, and mastered differently. Sometimes, the benefit of the (different) mastering outweighs whatever negative might exist from using a later generation tape for the master. In pop records, some mastered by TLC sounded good (I've have to go back and search for titles); the first three Zep albums had some versions on the early Red Label inscribed with the letters TG which are outstanding- compared even  to the "gold standard" UK plums and US RL (for LZ II). In some cases, like Columbia, for pop, the US records tend to be very bright, e.g. Blood Sweat and Tears second album, and the Canadian and UK pressings are less strident.
I'm not partial to Japanese pressings, despite the quality of the vinyl, because the EQ tends to be brighter, but again, depending on the record, there are winners. Somebody turned me on to a Japanese third pressing of LZ1, and it is outstanding, even by comparison to the UK plum with first matrices, the vaunted Piros remaster from the mid-70s and all the other uber copies I've heard or own. Of course, this is trying to make a pretty bad recording sound better, so perhaps it is not a good benchmark. I think for every rule of thumb there are exceptions. Which is why trying to get the best sounding copy often means buying a bunch of copies and doing the comparisons yourself. Obviously, a time and money-consuming exercise, particularly if you don't then sell off the copies you've decided aren't the 'best' -whatever that means. I also think in some cases, the 'differences' are a matter of sonic preference and system bias--I'm not talking about grossly bad records, but those in the zone of different shadings or points of emphasis. 

Inna- I’m probably violating my own admonishment by generally characterizing the EQ of Japanese vinyl as tending toward "bright." In fairness, my observations are largely confined to pop/rock music and then, to releases of records originally issued outside of Japan from the ’70s and early ’80s, when U.S. vinyl was pretty uneven, quality wise. The peak era Floyd- were there any bad pressings? For Dead Can Dance, I’ve had very good sound from the original 4AD pressings, though the Mo-Fi of Into the Labyrinth is very good for the money. For what it’s worth, I find that a lot of newer audiophile vinyl remasters from the U.S. sound tipped up too.

Are you saying that you prefer the sound of the Japanese pressings of Dead Can Dance to the original UK issues, leaving aside promotional copies for the moment?