The price, operating characteristics, and dimensions are largely academic. Unless you had failed to notice, the purpose of all these studies is to prove conclusively that:
a) The UK MoD couldn't come up with a catchy acronym if their index linked pensions depended upon it.
b) If you keep changing the study name, people don't realize you are trying to flog the same dodgy goods (like Blackbushe market, but without the quality).
c) By keeping inter-service rivalry alive and well, no-one gets around to targeting the real inept procurement practices that would make a Russian State official blush.
"DPA, Yesterday's equipment for tomorrows battle" - Now that's catchy.