Dr. Pepper, yes. Thank you.
But one advantage to taking the lump sum, I think, is that it gives the winner the extra flexibility to choose to utilize more of the money earlier (hopefully in a wise manner.)
And even if he wouldn’t use it earlier, their might be a (psychological or actual) benefit to at least having control over all of it immediately, rather than having to wait for an additional 19 annual payments.
After your above analysis, I can’t think of any tangible benefit to requesting the annuity (again assuming proper discipline.)