[betageek]

If this was deliberate it would fit perfectly, which it doesn't - the radii on the corners are very different. Apple aren't that sloppy.

[sudont]

I would have to agree with this. More likely, the same design team was on both projects and they used a set of proportions to create a visual harmony across the entire product line.

Phi doesn't change, why should your proportion change if it's nailed?