witch one is better In this two MVC diagram Models?

we are design two kind of MVC models that you can see in picture below . in first diagram , we have one controller that can work on routers ." Decide Library " , is for deciding that witch model wee need for Route that comes to controller .

in second diagram , we have one controller that has some Sub Controller by the routes , each sub controller can decide witch model can be include .
sorry if i cant explain good .
my question is that witch one is better for bigData ?
   

I believe in one model per controller to keep things simple to modify later.

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I think you're going to find that if your website has any real complexity that there is not going to be one way of doing things.

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