[HomeDepot23]

I would pose this question on the flooring board where Angus, BudCline or Jazzman will give you a good answer.

I know that the hardiboard is a good deal lighter and less prone to breaking. But many of the old time installers refuse to change their ways and stay with the bulkier harder product.

Hardiboard is under constant threat as new, but pricier options like ditra and a hardiboard look alike that you can carry at least 3 pieces with one hand.

For the differences, which was you question though, check with the flooring side.