No, even if You tick all these options, except "preserve diffuse" it won't be the same. But I don't know what for someone would use "preserve bump" or "preserve reflectivity", because I can't see a clear situation where it would be needed. Opacity maps on the other hand would save a lot work with volumetrics if You wan't to composite it in post. For example if You work with many 3d vegetation objects and wan't to render a separate pass of volumetrics, if You don't change the leafs materials manually with preserving opacity maps, You get bad results. So it would be very useful option, especially for animation :). Right now You have to save another file, change all the leaves manually - imagine 20 foliage models like bushes, trees, ivies and so on. Than try to make any changes, like moving some objects in the scene, and if You need another volumetrics pass, you have to redo the same work twice...
A one click solution for this problem is worth some programming I think :)