By my eye, the teaser showed almost a 2:1 ratio. This one shows a ratio identical to Scorpio almost.
Also worth noting that if you take 70+250=320 for Zen 2 and Navi 10 and give the extra 60 mm^2 for the GPU, you scale to 52.8 CUs (there's some stuff on the IO die the GPU wouldn't have that would likely need to be moved over, too). Given that it likely doesn't have a full 384-bit memory bus and not everything needs to scale up, I think the CU count is indeed likely in the 56-60 range.
What about the use of what looks like copper, what's the significance of that?