I can't comment on the taste of the Raja, not quite yet anyhow
But for comparison between the Raja Puri and the Dwarf Namwa, here is a picture of my RJ (from this morning). 6 foot step ladder to the right, you can see the flower stalk coming off on the left.
Here is the DN, also from this morning, same ladder (no flower stalk yet).
Both were purchased in June of 2011 and planted in the ground around July/August of 2011, and were about the same size plants.
DM