Looking at prices in your country, i would go for RX 470. Noticeable difference in speed between 470 and 480 is when 480 have 8gb of memory. Since both of your cards have 4gb it's just not worth it to go with 480s
Thank you all for posting!
Do you know why 480 8GB is faster? I'm new mining, and I don't know too much, as far as I understand vram memory is used tu allocate the DAG file, but if DAG file is smaller than 4GB what is the upside?
I can buy RX 480 with 8GB of XFX for 225, SAPPHIRE for 235 or MSI and GIGABYTE for 245, but I read that XFX is not recommendable.
Regards
480 8GB is faster due to faster RAM and more units, but it spends more power and costs more, so ROI is longer