From what little I've been able to find out about it, the Centre for Development of Advanced Computing (CDAC) are the designers and VVDN are just the contract manufacturer. VVDN were selected as they have the necessary manufacturing facilities.
The Rudra supercomputer will use dual socket Intel CPU servers with GPU acceleration, and an interconnect system called "Trinetra".
The individual servers are intended to also be as the basis for conventional stand alone commercial servers. The intention seems to be more that of using the HPC project to help advance India's commercial server manufacturing capacity rather than trying to be at the bleeding edge of supercomputers.
In other worlds, it's part of their economic development program, and should be evaluated in light of that.