What is the reasion that we can give to client [Cognos Vs Jasper reports]

[Gollapudi]

Hi Every body,

Here I have a question, I dont know about Jasper Reports, but I have to answer this question, if some one have any answer for this please let me know.

I repeat my question:
Why should we go for Cognos reports instead of Jasper Reports, though we have all the facilities in Jasper which are in Cognos, also Jasper is a Open source and Cognos is payable.

So please let me know if there is any strong reasion.

Thanks,
Venu.