Expert Pro 440 vs. 1000

[Confused]

......... Consider some facts, the 400 and 800 have the same internals, the electronics are the same.  ..........

Question concerning your post above...I have read similar comments as yours above but also others that implied there are truly some hardware differences between the two series.  How can we confirm which of these two opposing statements is the correct one and if a difference exists what are these hardware changes?
Hard to believe they are identical units with one simply "detuned" to a lessor power threshold.

First to make sure my post was clear, I was referring to the D400 and D800 (or D200 vs D250).  I believe that there are some small differences between the current 220 Pro and 250 Pro models.  So how do we confirm if this is correct?  One point I would make here is that I cannot recall anyone stating with any degree of credibility that the electronics are different between the two.  There has been some internet chatter, that they must be different surely?  And other posts stating that Devialet deliberately reduce the performance of the lesser models using firmware, but it is just that, internet chatter and speculation, never based on anything firm.  I based my comment that the electronics in the D200 are the same as the D250 (Expert / Pre-Pro) on a statement made by Devialet's Chief Engineer Mathieu Pernot at an Oxford Audio event a few years ago.  OK - I agree that this statement is not confirmation of the fact, for all you know I might have made it up (although I did not, for the record), or indeed Mathieu Pernot may have made it up, or those at the event may have misunderstood what he said, who knows?

If there is a desire to prove the point, then a good starting point would be Manoet's thread where he completely disassembled and rebuilt a D200.  The pictures provided show the Devialet revision designation numbers on each of the circuit boards and other components.  If anyone can find equivalent pictures of the innards of a D250 Expert, then you could compare and confirm.

https://devialetchat.com/Thread-D200-Reassembly-thread

One thing I cannot find online are any definitive pictures of the electronics in a D250 Expert.  If these can be found, then it would be fairly easy to compare and confirm they are the same, or confirm any differences.  One point I would make regarding the pictures provided by Manoet, is that the D200 Expert circuit boards include the cut-out for the associated window in the D250 "muffin top" case, which does imply at least some commonality between the two.

Does anyone have any pictures of the insides of a D250 Expert?

Edit: I have just found this, which shows the D800 ADH board as Rev5.4, which is the same as in Manoet's pictures.

https://www.devialet-store.nl/sites/defa...Pro-EN.pdf