The mono vs. stereo argument is something that I guess a lot of DJs mull over , when , in fact , a lot of 60's singles were mixed real hot , whether they were one or the other , tho' a lot of early , panned stereo sounds terrible. It really just depends , and most club's sound systems are incapable of keeping everything on an even keel , anyway , whether it's LPs , 45s , or CDs.
I've found that most records dating up to the mid 60's (The majors gave up on mono in '67 , if I'm not mistaken.) sound better in mono , but , maybe only because they sound different to the versions I knew better....Fuller if not necessarily louder. DJ singles WERE PRESSED WITH MONO AND STEREO VERSIONS of the same song well into the 70's , but , sometimes , one version did'nt sound that much different than the other. I think a lot of people are too hardcore about mono . As you said , it often depends onthe track. The bottom line is , do YOU enjoy a particular record in mono or in stereo , and would you want other people to hear it ?