Xiaomi AX3600 China vs EU versions

I'm gonna purchase a AX3600 from my local retailer. They've 2 versions available, EU & China. Does anyone know if there are differences between these 2? Are the firmwares interchangeable? Does the current unofficial openwrt firmware supports the EU version? Thanks in advance for the help.

you should probably read the two AX3600 threads in https://forum.openwrt.org/c/devel/8

My guess is INT = EU.