Slightly different specs from the Pre90, but it also has the headphone amp and the display to help out with seeing what's going on.
So, at this price point what is advantage of ordering the pre90?
Currently, I don't see the advantage on ordering a Pre90. If Topping has an update for the Pre90, D90SE and A90D in the works, then most likely that would be the one to get instead of the current Pre90.