I searched and found a few comparisons via video: contour 1 vs contour 2 side-by-side compare.
It'd be consuming...if not exhausting, as EK noted...to compare with mouse clicks. However, you could compare each against a list of what you want. For example, if you want specific apps, create a list of the specific apps and compare each IPG to your list.
Another consideration, which could save time, is what receivers are available in your market. For example, every time I go to the list of Cox receivers, the page prompts for my zip code (Article not Available to You). I think it means my choice of receivers is limited in my market.
www.cox.com/.../identifying-your-cox-digital-receiver.html