Consider the bass guitar line of a song called "Schism":and another bass guitar line of a song called "Pneuma".
When Pneuma was released, many people from various threads commented that the bass line in Pneuma is almost exactly the same with the bass line in Schism. Others are talking about chord progressions, time signatures, etc. (which I know nothing about). Some even went so far as to say the similarities prevent them from enjoying the song. I, however, find the bass lines to be different and distinguishable from each other. This might be because I have no advance music knowledge. To my ears, they don't sound similar at all. By feel perhaps, but the melodies and pitch are not.
Can anyone explain what my ears are missing? How and why are they really similar?
Note: I don't have any knowledge in music theory.