AMD Z1 Chips in Asus ROG Ally Can Sip as Little as 9W
But otherwise it looks a lot like the Ryzen 7040U
We followed up with AMD to ask if the XDNA AI engine is removed entirely or disabled, and the company responded that it is disabled. That means the chips are likely identical at the silicon level. In the end, there will only be one way to truly suss out the differences: benchmarking them as they hit our labs. For sure, making a chip work in a handheld the size of a Steam Deck (in the case of the upcoming Asus ROG Ally, it's actually smaller) is going to take some work, as you don't get the amount of space or cooling that you do in a laptop.
We've also yet to see what the Ryzen AI engine from the XDNA architecture is capable of. That may give the laptops an edge, though it's unlikely current games would take advantage of it, which makes a case for removing it from Z1 and Z1 Extreme.