What does the difference between RetroArch and RetroArch(AArch64)

RetroArch Android devices
#1

Hi all, I had installed both Retroarch( 32bit and 64bit) on my Android TV. It works fine. I don’t know what difference between both version. Which one do I installed? My device is using RK3328 (Cotex-A53).

Thanks a lot.

Pogo