Does ROI directly translate to edge over opposition?

[HesseJam]

I think it means that your edge against the average field is 19% which illustrates that the 9% rake is scary, doesn't it?

OTH, the rake in the .5/1.0 limit full ring is about 4.5 BB/100 and it is way harder to have a 4.5BB/100 (= 9BB/100 edge) winrate there. So, it is harder to match the poker room profit in full ring than in SnGs.