Seems like Deck beats out Ally up to 10w. 11w they even out. After Ally surpasses Deck. Also note Allt can go up to 30w which this graph doesn’t show. Allow fan noise and heat is also considerable lower up to 20w where as Deck heat and fan noise gets way louder closer to 15w.
The graph also shows Ally can get some real performance upto 18w when it starts getting diminishing returns