May I ask how you come to that conclusion? Considering that the XCE has been talked about ONLY, unless you have actually been able to use the Mille and the rumored XCE, this statement is noting more than spectualtion.
The Makinta PO5000C was supposed to put the XC 3401 into the history books. It was supposed to be much faster at correcting paint, much smoother, and was dual mode (free rotation and geared rotation). When the machine actually arrived, the free rotation mode was found to be not very useful. It was smoother, but it corrected paint only marginally faster. In return, you had a machine that was somewhat faster, but not significantly so (it would take the XC3401 one section pass more to get the same correction, when the pads and compounds were identical, on identical panel surfaces). When it was announced, it spun in the same direction as a rootary; when the polisher actually arrived, it didn't; it spun in the same direction as the XC340. All this is to say, that what you end up in your hands may not always be what is "said" or :rumored" to be the case, isn't. Having said all of that, please let us all know how you came to the conclusion that a polisher that as of yet, only exists as either a prototype, or in a lab in Germany, will be better or worse than any existing polisher (XC3401, PO500C, Mille, or any other geared rotation polisher)? Or is this just the "its a Rupes, so it is better than everything else" sort of statement?