I was out in denver this week at an IPIP event and had a quick discussion with the local HP representation as he was showing off the latest vPro model. I asked him if there was a place that explained each of the HP model's as I continue to get asked this question. He responded with this URL, which I had not seen at this point.
You can scroll to the bottom and click on the business notebook tab to see every HP model.
To the HP guy, I owe you for the great link & thank you for sharing with me..