The hardware is the hardware & everything has a maximum capacity.
WiiU;
CPU - Tri-Core IBM PowerPC "Espresso" @ 1.24 GHz 3 MB L2 cache
GPU - AMD Radeon "Latte" 320 shaders @ 550 MHz (0.35 TFLOP/s) Fillrates: 4.4 Gpixel/s, 8.8 Gtexel/s
RAM - 2 GB DDR3 RAM @ 1600 MHz (12.8 GB/s) (1 GB available for games)34 MB eDRAM @ 550 MHz
PS4;
CPU - Octa-Core (2 quad-core modules) AMD x86-64 "Jaguar"-based Shared 4 MB L2 cache (Cores 0-3: 2 MB, Cores 4-7: 2 MB
GPU - AMD Radeon "Liverpool" 1152 shaders @ 800 MHz (1.84 TFLOP/s) Fillrates: 25.6 Gpixel/s, 57.6 Gtexel/s
RAM - 8 GB GDDR5 RAM @ 5500 MHz (176.0 GB/s) 256 MB (2 Gb) DDR3 RAM (for background tasks)
XboxOne;
CPU - Octa-Core (2 quad-core modules) AMD x86-64 "Jaguar"-based @ 1.75 GHz Shared 4 MB L2 cache (Cores 0-3: 2 MB, Cores 4-7: 2 MB)
GPU - AMD Radeon 768 shaders @ 853 MHz (1.31 TFLOP/s) Fillrates: 13.6 Gpixel/s, 40.9 Gtexel/s
RAM - 8 GB DDR3 RAM @ 2133 MHz (68.3 GB/s) (5 GB available for games) 32 MB eSRAM (on-die)
The XboxOne is a 10 but the PS4 is a 11.
