I meant, if they will put more CU maybe they'll end anyway being limited by the RAM bandwidth. Yes, it is DDR4, maybe even dual channel but it is nothing like having even a 128 bit GDDR5 like in the lowest-end Radeon based card, the RX460. And it's shared with the CPU.There is some improved power management in BR, which might allow for somewhat higher CPU and GPU clocks, than with CZ.
One poster says: same number, the other says: more CUs.... ^^
BTW, there is DDR4 instead of DDR3.