Has anyone compared Roboto to other Helvetica-like fonts?

In other words, it would be interesting to see the differences between Akzidenz-Grotesk, Arial, Helvetica, Helvetica Neue, Roboto, Univers, and Vera. Something like:

http://en.wikipedia.org/wiki/File:Helvarial.svg

My guess is that other than typographers, people mostly cannot tell any of the Helvetica-ish fonts apart, and there are much bigger differences between weights and such.