Bwa ha ha, they're both D550CA but have a different suffix. That said the BH31is the better of the 2 as it has a more powerful processor, more ram, a larger hard drive and I'm assuming a newer graphics chip. As far as cpu and gpu go neither of these will play any games from the last 4 years on anything but low settings, if at all. If your intention is not to play the latest games I think you would still be served better by the bh31. If you want a gaming laptop be prepared to spend between $600 and $1200 depending on the power and quality of the components.
