The point of discussion was if it is better to immigrate to India from BD or vice-versa. In that regards, we are comparing the living conditions, indicated by income and GDP, per capita. PPP is better reflective of that than nominal.
I posted the latest data I could find for the neighboring states, which was for 12-13 on GoI site. We will have to wait till they release latest figures than, or if you can find them. And no, Indian GDP didn't decline. It grew at slower pace, not declined. The growth rate was just 1.5% smaller than BD. Either we assume that income grew at same pace (4.5% India, 6% BD ), than WB still come on top of BD.
They don't release PPP data for individual states. They don't even release it in $. I posted the link to the GoI site, which only showed the figures in INR, that too from 13'. I gave you the PPP multiplier from IMF site, but there are no 14' figures available yet.
I may be wrong than. Lets wait for the latest figures to be released. But if we are talking about immigration, it happens over the years. India has been ahead all this years, while BD only showed so much progress recently. Obviously the flow doesn't changes suddenly...