You can talk and talk and talk this one to death. Or you can just go buy a BetterRecords.com White Hot Stamper and then you will know:
Its not that the originals are all better. They are all different. Same as the reissues are all different. No two copies sound exactly the same. Don't take my word for it. Play any two back to back and hear for yourself.
So the way it works is, among the many copies of original pressings are some that sound spectacularly good. So good you can hardly even believe it. I mean just jaw-droppingly good.
By and large, if you can average such a thing, then original pressings sound better than reissues. Some reissues are just pure crap. Honestly, the only reason everyone doesn't know almost all reissues are crap is because almost no one ever gets to hear just how good those spectacularly good sounding originals are. Because they are so few and far between. Otherwise, if you care about sound quality, then you would be like me and never throwing your money away on a reissue ever again and dissing reissues every chance you get.
Thousands by the way, if you are in it for sound quality, is a ripoff. For sound quality you only need to pay several hundred at most. Anything beyond that and you aren't buying a record, you're collecting a stamp.