How come you can recognise the tune of the number one song of 1968 as being Hey Jude by the Beatles, but not the number two song? Eh. This kept Jude's sister

How come you can recognise the tune of the number one song of 1968 as being Hey Jude by the Beatles, but not the number two song? Eh. This kept Jude's sister track "let it be" at #2 in the UK http://listen.grooveshark.com/#/song/Wand_rin_Star_Lee_Marvin_/2472051 http://listen.grooveshark.com/#/song/Wand_rin_Star_Lee_Marvi... Somewhat less remembered, I think.