There was a lot of variation on LP pressing in the 60's, 70's and early 80's. There was a bunch of different pressing plants just within the USA and there could be a number of reissues the same year as the original release and up to 10 years later due to the large volume of sales.
I find most of my earlier LP pressing to have a more balanced mix than some of the remasters today but rarely lacking on the bottom end. I have some fantastic new pressings from Analog Productions and MFSL and also remasters from some of the original labels like MCA and Columbia but I do find some of the new remasters to be a little heavy on the bottom end. I'm sure a lot of people like the amped up bottom end but I prefer the more balanced attack of the old original pressings. It's all a matter of personal taste in music.