Braiins OS has always been a manual firmware, it does NOT autotune, YOU have to do it, its easy to get 18 TH with immersion with carefully finding the best speed and voltages for each hashboard, or 10TH 800W as others in this forum have achieved.

If you are too lazy to adjust and test parameters on your own, you use Braiins OS+ and let their algorithm sort it.

Unlike others, Braiins OS is NOT A MOD. There is nothing Bitmain; no bmminer, and no xilinx distro, its a complete OS replacement.

In Android phone terms, its like comparing cyanogenmod vs ubuntu touch; or like a cloudbook with its Android replaced with an actual GNU/Linux distro.