Well, going via a naive approach using VRAM alone: PS3 = 256Mb PS4 = 8Gb, shared. Let's give this a 3:1 GPU-CPU split, so 6Gb. 6144Mb/256Mb = 24x bigger. Bearing in mind that each double in texture size quadruples the memory overhead, that leaves you with an average of two doubles of texture size, leaving 1/3 of the…