I think in a lot of cases the product is suitably different in a way you can't easily compare for every deal. Amount of support, client licenses, cross promotio

I think in a lot of cases the product is suitably different in a way you can't easily compare for every deal. Amount of support, client licenses, cross promotion, source code availablity, features. For server hardware I've seen companies simply upsell more expensive more profitable model to the customer paying more.