As said it would come down to which was the better deal. Things like, does one hav ea better cooler. Is there a better bundle with one, such as is there a game voucher or better selection of cable included etc. How long and how good is the warranty.
I would not say one was a better make than the other and so if they were both more or less the same then either as sugested flip a coin or go with which ever one you loke the looks of best.