Rigorous testing is something to behold. (Yes, the guy could be a shill for two products mentioned; but if so, at least his findings come down on the inexpensive side of gadgetry.) I just wish he had tested a third variable: real espresso, forced under pressure.
Two years ago we drove to Merida, bringing our Starbucks Barista espresso machine along; and we left it there in storage with friends, buying a used replacement just like it on ebay for enjoyment up north. This illustrates the vexation which comes with living at two addresses: double stuff. (5 minutes. You can click the box to skip the ad.)