Board Thread:Theories and Speculation/@comment-4688597-20150531233756/@comment-26090730-20150601044227

For any hard question an easy explanation exists:

-Indra: Inherits a downgrade version of his father eyes, genes for powerful chakra and spiritual energy.

-Asura: Inherits his father body (whether that means), his powerful lifeforce, physical energy and large pool of chakra.

As simple as that without to much unnecesary in deep look. Also as far as i remember it was never stated that the lesser body(Asura)was equal to the lesser eyes(Indra) in power (at least from the get go, later it did)