Which Sapphire Nitro? 470 8GB or 480 4GB

I have the choice between these two cards at roughly the same price.

I'm not considering messing around with the BIOS, but I do want to optimize hashrate / power draw / noise / temp etc as much as possible using WattMan.

Which one would you recommend and why?

SAPPHIRE NITRO+ RX 470 8G DUAL DP OC
2048 Stream Processors
1121 MHz Core / 1260 MHz Boost
2000 MHz Memory
Power Consumption <175W

SAPPHIRE NITRO+ RX 480 4GB DUAL DP OC
2304 Stream Processors
1208 MHz Core / 1306 MHz Boost
1750 MHz Memory
Power Consumption <225W

Thanks in advance.