Actually the case of the 980 is entirely different from the 950. They look similar in photos, but they share no parts whatsoever. The 980 is slightly wider and shorter than the 950 to address installer requests about the form factor.

And believe it or not, the fact that there's no hard record button was also in response to installer comments telling us that most of their DVR customers select recordings from the onscreen guide instead of using the record button. We're starting to hear more comments going the other way now, and that's how the 810 ended up with a hard record button.