Zorawar's design borrows heavily from the NGMBT:

Except the NGMBT was designed to ~45-55 tons in weight. Zorawar needs to be ~25 tons. So, the NGMBT design needed to be scaled down substantially.
While the Zorawar retains the NGMBT's hydro-pneumatic suspension system, the floating pistons, AHSUs, damper blocks etc. had undergone a size reduction.
The track set up has also changed quite a bit. The number of road wheels have remained the same, but the size has reduced. As the Zorawar uses rubber tracks, instead of metal tracks, the number of top rollers has been reduced. NGMBT had 16 top rollers per tank, Zorawar has 6 top rollers per tank.

The road wheels & top rollers are likely to be all composite in their construction. Another item borrowed from the NGMBT:
The hub, which transfers the engine's power from the clutch to the track, is no longer made of steel. It is now made of Titanium castings:
Zorawar also has a smoke clearing system which probably a variant of the Self-Cleaning Air Filtration System made for the NGMBT:

There is a reason the project has moved so quickly. So much of the R&D work was done before the project was launched.