Thanks for the advice been working on this this morning.
The first one I can get near, or in the same ballpark but it hasn’t quite got the same shape or movement that makes it so interesting. Pitch modulation was a good shout. A fast LFO on Ratio C seems to help too.
The second bass sounds very square to me so with basic ratios (4:4) and square off the harmonics, bit of a slower attack on the filter, more sustain and decay on the amp, bit more release too, slow LFO on filter freq, some detuning and move the mix more toward Y and I’m actually quite close to that sound!
Needs more work but thanks for the tips! These are going in my notes