A mainstream master, intended for an ordinary consumer, is created with low dynamic range to sound "loud", which is perceived as "better". Also, mastering engineer knows that most of listeners will listen to this on a very shitty speakers and adjusts frequency balance accordingly.

However, when you do a separate vinyl master, you can safely assume that your audience will not compare this version to others on youtube or radio, and that they will have better equipment - so you relax the compression settings, switch off L2 maximizer and allow the track to breathe a little.