I've isolated 40 secs of bass line in both million miles away and red kiss. They sound similar because they are the same key, same chord progression and same basic rythem. However, as a bassist, I can tell you this rhythm is SUPER SUPER BASIC AND COMMON. In Irene's song, bass line is repetitive with which means it's probably done by midi and copy paste. In red kiss, the bass line has more ghost notes, fillers, and the grooving has way way more dynamic. Red kiss is recorded with a bassist doing slapping and popping.
There is no issue of sampling if you listen closely.