Ok Mactec some tech for you
The picture has 2 graphs, one for 6061 and the other 7075 (from Mil Handbook 5)
Left hand picture shows the 6061 yielding at approx 36ksi, with a strain of .0035in/in
Right picture shows for 7075, at a stress of 36ksi, the strain is also .0035in/in. (but not yielding)
Therefore at a stress of 36ksi, 6061 and 7075 will have the same deflection. 7075 will yield at approx 69ksi (longitudinal direction) at a strain of .0065in/in.
You can see that up and till it yields the slope of stress/strain is a straight line for both 6061/7075 and any other aluminum.
Therefore for the same force/moment the deflection will be the same (with minor variations) for any aluminum up to yield.
Per MilHbk 5
Youngs modulus for
7075 = 10.3e6 psi
2024 = 10.5-10.7e6 psi
6061 = 9.9e6 psi
7050 = 10.3e6 psi
so all very similar