Next question: How different in performance, in your experience, are W760 and H414?
W760 and H414 are right next to each other on the Hodgdon Burn Rate chart at 108 and 109 respectively. They're both spherical powders with similar uses and burn at very close rates. If you go to the Hodgdon Reloading Data center, and look at .30-06 loads, they list identical charges at identical velocities with identical pressures.
I can't tell you they're the same powder, but this wouldn't be the first time that Hodgdon sold one powder under two different labels.