Lightroom's output sharpening uses a different algorithm than the standard Unsharp Mask. This algorithm takes into account the type of media the output will end up on and the final resolution of the image. We worked with the Pixel Genius group to fine tune these settings.
So there aren't any equivalent Amount/Detail/Radius/Masking values for these three levels; the algorithm the pixels go through is fairly different.
Thanks Kevin for the information.
FYI, the particular output of concern is via SSP LR plugin in the web module. I've found that setting '1' (low) works well for small detail images and '2' (medium) for more gross detail images. I was hoping to easily duplicate the results in PS for images destined for SSP for Flash SWFs.
I'll keep using PG, tweaking the settings while viewing results in the SWF, to get the desired results.