Was the D-Premier upgrade a waste of money?

[f1eng]

... of course, you could pose the equivalent question "was the D-Premier so good that it was pointless to upgrade?"

Before I did the upgrade I had a demo of a D-Premier and a D-250 side to side on a Wilson Audio Sophia system (newest type) at my reseller. The D-250 was the clear winner for me (more musical, better focus, better Soundstage, less grainy in the trebles; Air sounding better via ethernet on the D-250 than via WiFi on the D-Premier). 

I've never regretted the upgrade. With the D-Premier I had a lot of problems with (WiFi-)Air (white noise, hiccups). With the D-250 amp Air via ethernet is playing very well in my setup. No issues here. I don't use SAM. Only 11 votes for my LSs till now. I doubt if I will ever be able to use SAM on my Dynaudio Sapphires. The limited edition of the model (1000 pairs worldwide) is sold out. 

I am surprised.
Air worked just as well for me on my pair of D-Premiers as it did initially in the 800, it doesn't any more, though I have never had white noise under any circumstances, so I am eventually thankful for the Ethernet input...
Maybe it is/was expectation bias on my part but I did not notice any difference in sound between D-Premier and 250, but I did not expect to since the audio part is unchanged and my horns probably (definitely?) do not need a more beefy power supply.