Brian, Ted is right though you make a good point. I'll say your not 100% accurate on this rather than wrong because the stroke increase does indeed eat up more duration easier than a shorter stroke does. This the requirement of a larger cam for the stroker to perform the same outlet on a increased level vs. the shorter stroke cam in return per cam spec as in the effect it has on each engine.
(In how a big cam is radical on a 273 but tame on a 400