You beat me to it Forza: there was no meaningful comparison at all.
As for Karthikeyan retaining a drive for the inaugural Indian Grand Prix; the move is entirely political.
Valid points about the young driver test. About Narain keeping his drive for india, it's not political, it's sponsorship. Will HRT be sponsored by red bull now though?
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But seriously do you really not rate Senna? I know he did not set the world on fire at HRT but I do not think even his uncle could of done that much in that car. Senna would of got the Honda 2009 seat if they had not pulled out and I think in his test he came within 0.3 secs of Button's best time which was about the same gap between Button and Barrichello in quali in Oz, so who knows what could of happened if Senna had got the seat. I am not saying I think Senna is really good, nor that he is crap, just that he has not had a proper chance yet in F1 to show what he has got, if anything. However my view is probably not without bias and your view is most likely more objective than mine. I just hope he gets a go in the Renault because then we will know the answer.