This means nothing. Ford has by far the strongest stock tranny, but probably the weakest after they are built. built tranny to built tranny the dodge is far superior to the allison.
To the best of my knowledge, there has been only one truck that has run both trans, and it has hurt both.
The only reasons I can see to run the Dodge so far is weight reduction and fewer gears for drag racing purposes. But I'll admit I'm only 800rwhp or so with no clutch pak or hard part failures in the Allison.
The dream trans would have a 3-sp:
1) 1.65
2) 1.00
3) 0.70
Or there abouts.
This give mid 9 second top speeds with factory gears, and still keeps the trucks in the max power area.