Canadian LP pressing, how good?

opus88, yes I understand what you said.
Just bought 'Bitches Brew' Canadian first pressing with all As in the dead wax. We'll see.

opus88, thank you. I'll take a risk and try a few.

So I got this Canadian original pressing of the Bitches Brew. Well, I had to send it back because the records were not in good enough condition, but I listened to them. I prefer original American version because Miles's trumpet sounds more alive, though the Canadian is not bad at all. Yes, I did have this impression too that the Canadian was somewhat more refined and a little quieter. However, at least for this album, it was not the most important aspect for me. Now I think I am going to try original Japanese, this could be interesting. Japanese records of John McLaughlin and  Mahavishnu Orchestra are so much better than American, British and Dutch. Didn't try German. 

None of the Japanese records I have sound bright, but I don't have many and they are all Columbia/Sony from seventies.
Yeah, comparing pressings takes time and effort but may be worth it.

Forgot to mention that I also have two original Japanese pressings from eighties - Spleen and Ideal by Dead Can Dance and Cielo e Terra by Al di Meola. The former sounds better than original UK and the latter than original US and Holland. Better in every respect. These are not Columbia recordings. And Japanese vinyl is so quiet. I don't have any pop records, so can't comment. I heard that Pink Floyd's Dark Side sounds superb on EMI/Toshiba pro vinyl, and that original Japanese Wish You Were Here is excellent though not as good as original Harvest. The original German I have is okay, nothing special.

I have all the Dead Can Dance albums. The Aion is a white label  promo and the rest are regular original UK issues. Though hard to compare different albums, this promo sounds really good.
I also have a few Japanese original promos in addition to regular original Japanese from seventies. The promos are significantly better, especially in terms of dynamics and resolution. Hard to find and expensive but worth it.

I only compared Spleen and Ideal. Yes, I preferred the Japanese to the UK but the difference was not big as I remember, I sold the UK record years ago.