The styling is as much or more the comparison than the size. I'm guessing Acura will eventually pick up the HR-V based on the show car they have already demonstrated. The NX will be the smallest AWD vehicle in the Lexus line. So, I was kind of going off that.
Yes, size would out it more on par with the CRV/RDX. But styling is targeted at the same people who I suspect will look at the HR-V. Maybe a more masculine version due to the more angular lines.