I have an Android LG Optimus G E975 with a Snapdragon S4 Pro quad-core processor at 1.5GHz which makes 6GHz in the total. I don't know if is enough for full speed emulation but unless at very playable speed, i think.
No it doesn't make 6GHz in the total. 6Ghz is 6Ghz per core. Not 4x1.5GHz or 2x3GHz or whatever. I specifically stated that on the previous thread you made.
The system requirements will be known when the emulator is released. We don't know them yet. It will be far lower than the 6GHz example I gave you earlier. A Snapdragon S4 Pro might be enough or it might not.
You also didn't have to make a new thread. The previous thread you made is enough for stuff related to Dreamcast on Android.