Most B-50 Complex supplements are the same dose. 50 mgs of most Bs and 50 mcgs of B-12 and another B.

B Complex or Super B Complex is a different product with usually a lower dose of the B vitamins but C and others things added.

I would consider UPMC before CogFX. UPMC is open about their research. Cog FX keeps most of their research hidden. Their 'successful' standard is subjective, not objective like I would like to see. $8000 to $10,000 is a lot to spend with a company that is not transparent about their process.