Ha ha! I was getting very confused because I made the same suggestion as Ashish two days ago but it doesn't appear here! You posted the same thing twice: http://www.projectnoah.org/spottings/7579185
Leafs, Flowers, Stem and growth of erect branches is different..!!
Leafs of Procera are softer than Giganeta.
Giganeta Grows upto 2-3 meters high in well conditions Procera upto 1 and 1/2 meters.
Giganeta's Petals are bent down like convex shape and Procera's petals always like half open Concave shape.
Satyen Giant Milkweed is different plant....
http://en.wikipedia.org/wiki/Calotropis_gigantea
http://www.flowersofindia.in/catalog/slides/Crown%20Flower.html
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