Dear Shri Sangom sir,
I read through the Wiki article and the similarity of ideas is astounding. I wonder whether the Greek scholars who may have accompanied Alexander brought the seeds of Advaitam to India. Of course, such a possibility does not take away any of the brilliance of the Indian thinkers, but such subtleties are purely blasphemy from the POV of fragile egos.
This brings me to those who base their arguments on the existence of a creator god on the cause and effect principle. To them the very fact there is an effect is proof of a cause. In other words, the existence of jagat is proof of existence of Brhman.
This of course reveals the lack of rigor in their thinking. If an effect must always have a cause, then who is the cause of Brhman? Who is the cause of that cause? The infinite regress is self evident!
On the other hand, if the claim is that Brhman is ever present without a cause, then, that begs the question, why can't jagat exist in the same way without a cause?
Like Subbudu sir observed, I feel A, VA or D, they all are equally invalid. Of the three, A is so palpably absurd it is a wonder there are people subscribing to this view. Even the most famous rope/snake example they love to cite, presupposes three entities, a rope, a snake, and an observer, so much for unitary reality, yet they have the audacity to cite this as an explanation for advaitam.
VA may be more in line with the Vedas, but, as Subbudu sir has correctly observed, it presupposes a lot of preposterous ideas such as Sri Vaikuntam, Nithyasoories, Dhivya Athma Swaroopam, Dhivya Mangala Vighraham, etc., it just boggles one's mind. The proverbial invicible pink unicorn seems more real.
D, is another critique of A that goes further than VA, but in doing so, goes farther than what the Vedas, in its infinite wisdom, asserts some pretty unsustainable claims that flies in the face of rational thinking.
Here, I must note that VA is nether A nor D. But, when the similarities and dissimilarities are taken as a whole, A stands distinctly different from VA and D because A rejects anything else than Brhman - the one they call Nirguna -- as ultimately illusory. VA is no less farther from this notion than D. Ramanuja categorically rejects this idea. He goes as far as to assert that even our dreams are real. So, if a closeness contest is to be held and one is forced to choose which of the two philosophies, A or D, is closer to VA, then one has no choice but to side with D. This is not my opinion, the doyen of SV, Swami Sri Desikan is claimed to have sided with D in a debate between D and A.
Cheers!