I am trying to find the correlation between theravada jhana, rupa/arupa and the 9 levels of calm abiding in tibetan buddhism

Title really. I am reading the tibetan lamrim version of the 9 mental abiding and trying to correlate it to the theravada 8 jhanas, I can't seem to find which jhana/abiding is which in regards to the other tradition. The practice for both is still samatha. If anyone has an informed opinion or understanding of the practices I could really do with some help understanding how the 2 different explanations coincide.