I've experienced both. Some of the new re-release I have are exceptionally good, like Muddy Water's 'Folk Singer' and Miles Davis' 'Kind of Blue,' but some were not quite good, like 'The best of Lenard Cohen.'
>>I cannot believe how much better the new vinyl is than the old.<<
...
By and large the preponderance of original pressings will smoke the reissues.
I have an original issue of 'Kind of Blue' in very good condition, but it just does not match to the new release. I guess the new release is just better than the original one. Same guess to 'Folk Singer.'
But I am not sure about Lenard Cohen if the new re-release is just plain worse than the original or the original was just as bad.