does not sound like too complex of a bass.

Personally I dont exactly know but I would start with a sine wave type bass and a little bit of amp modeling

although not entirely the same exact tone, I have gotten a similar bass sound of the second track before.

The preset on a Juno 106 4.8 with some tweaking can sound really similar to this.

Although I think this is a digital synth in the recording. its not very noisy at all