BRICs

While reading 'The World in 2011', it was noticed that BRIC's I and R approximately have the same GDP but I has 10fold more population than R.
I & C leading with their over one billion population whereas B & R are 195million , 141 million respectively.

How would it look like to have them as 1) BR & IC or 2) RI & BC and add other emerging nations to each in accordance to population in 1) GDP in 2)?

OR just focus on growth rates?