It is probably going to depend on the person, because the two therapies are very different...
HCG is an LH replacement therapy. When you start it, your body's own LH will go to zero. Your testosterone level will then depend entirely on how efficiently your body makes testosterone, for a given dose of HCG.
With Clomid, your response will depend on both how much your body's natural LH is boosted by the drug, and by how efficiently your body produces testosterone based on that LH level.
Like Peak mentions, some guys will get a very big response from a very low dose of Clomid. This seems to be less common with HCG. In fact, since HCG shuts down your body's LH, it is possible that a very low dose could LOWER your testosterone level (the same is true of TRT). Clomid, on the other hand, should only cause testosterone to rise above your natural baseline.