We've actually got experience of both solutions, having evaluated both in our Labs. Our requirement at the time was focused on a large number of urban high density zones- with a particular need to understand Subscriber QoE - the drivers were Video (such as YouTube) and Social (Facebook, Twitter and others) and consumer focused generally. The 7Signal devices were not as close a fit for us at this time. I cannot go into a lot of detail due to my employment contract but we favored the epitiro one (
http://www.epitiro.com/wifi/). I don't see the product documents I've got in that section - maybe you need to make contact for that.
HTH,
JS.