The .284 is "supposed" to have the same case capacity as the '06 case. Thus the 6-06 and the 6-284 "should" have the same capacity within a grain or two and should have the same performance.
The .240 Whby and the 6-06 are identical except for the double radius shoulder.
Therefore what one will do all should do. Theoritically the load data should interchange. BUT I've noticed that in books which list all three it does not. Makes one scratch their head and say hmmm.