Big4 indian or global (like ey gds, kds, deloitte us india which one to choose?

one of my senior applied for ey gds Banglore, but not selected there, but what he told to me is that " it's all abt routine work not much exposure,but only facility is you can shift to ey india after six month ,or when ever there is requirement in specific Dept, now he is working in internal audit deportment in Grand Thortan Llp BANGLORE