@notesaddict- it all depends on which pressing, who mastered, what plant. If you read the deadwax, that will tell you. Atlantic actually put the code for the plants on the labels themselves. The one people tend to chase is the RL mastered one, which got pulled b/c it was too 'hot.'
The Monarch pressings tend to be bombastic to begin with- Monarch being a relatively small plant that was owned by the same people that owned Sonic on the east coast and Buddha records. Even though these were not considered top of the heap companies in their day, the Monarchs have a real following now, but the quest usually starts on LZII, at least for old pressings, with the RL masterings, which are evident from his inscription in the deadwax.