Asus RT-AC57U (RT-AC1200GU ?)

I bought an Asus RT-AC57U (Solod by Amazon in europe). It has the same specifications RT-AC1200GU does, in fact they even copied and pasted the name. "Package Content (for RT-AC57U): RT-AC1200GU Gigabit Router"

https://www.asus.com/Networking/RT-AC57U/specifications/
https://www.asus.com/Networking/RT-AC1200GU/specifications/

How can I tell if it uses the same Broadcom SOC like RT-AC1200G+ or MediaTek like RT-AC1200GU?
Does it or will it support dd-wrt?

Thanks.