I do believe that at the margin the issue worthy of greatest consideration is transparency and accountability and I believe that this justifies giving to VillageReach over SIAI.

What about everything else that isn't the margin? What is your expected value of SIAI's public accomplishments, to date, in human lives saved? What is that figure for VillageReach? Use pessimistic figures for SIAI and optimistic ones for VillageReach if you must, but come up with numbers and then multiply them. Your arguments are not consistent with expected utility maximization.

You would be much better off if you were directly offering SIAI financial incentives to improve the expected value of its work. Donating to VillageReach is not the optimal use of money for maximizing what you value.