It is true that AMA has a smaller resource footprint that MMA. It also has many other benefits.
However, Resource utilization is difficult to quantify because data collection scenarios can be very different. We are working to provide "benchmark like" results for a few different data collection scenarios that could be used in rough estimation of usage by customers. The page will be published in the near future. Until then I do not want to quote anything other than what we have publicly documented.