I do have both kites in my bag, the Over and the Nirvana ... the Nirvana came first. I can asure this:
Sail painels ... diferent.
Sail material... diferent
Conectores and yoyo stopers ... also diferent.
The rods are diferent too.
Upper spreader and lower spreaders have all diferent legths and diferent position.
Standoff position and clips ... all diferent.
Bridle ... completly diferent.
Price ... very diferent.
The way they fly ... also very diferent, and i can assure my Over cames off my bag more fast then my Nirvana.
Oh ... the bag is diferent too
In resume i don't see more similarities in this two kites then in ... just for exemple ... Elixir and Akuji.
I guess it's really something to have this quality kite for the price.
Here in Portugal there are lots of people flying the Over and learning freestyle nicelly. Having an easy tricking kite for 140 € (or 110€ in the promocional price ) did help a lot to increase the level of the portuguese pilots ... so ... i don's see nothing bad in it!!