Given that both consoles will have 8GB of RAM, I think that going with only 4GB of RAM (for a total of 6GB) could turn into a problem later, so I'd personally go with 8GB of RAM (for a total of 10GB), but it's a very balanced build.
Please excuse my bad English.
Currently gaming on a PC with an i5-4670k@stock (for now), 16Gb RAM 1600 MHz and a GTX 1070
Steam / Live / NNID : jonxiquet Add me if you want, but I'm a single player gamer.