I am by no means a bassist, nor do I truly understand playing or mixing it, but one song where the bass constantly stands out for me is Killers. Like, when I think Steve Harris bass Killers immediately comes to mind. His sound is very dominant and powerful on that song, where with almost every other song, he is very much part of the background. A driving force, always, but on Killers, it feels like Steve surges ahead, where as every other song he pushes from behind.
It's not a very technical analysis, I'm afraid, but it is what I feel to be true!