CCS/IWR6843ISK: Questions on IWR6843 Use Cases

Tool/software: Code Composer Studio

Hello TI,

I have some questions related IWR6843

1.Can i use hard code configuration for IWR1648
2.As per provided documents of IWR6843 increases range, angle and velocity of device, any other technical difference between IWR1642 and IWR6843which i need to focus on that 
3.i am using Indoor False detection demo code with IWR1642 but i observe very week performance compare to IWR1642 PPLCount demo, we considering its because of IWR1642BOOST board may i right ...?
4.IFD(Indoor False detection) demo improve(I want to ignore Plants, Fan, Curtains, inanimate objects) the performance when i replacing IWR1642boost with IWR6843ISK....?
5.For IFD demo run we order IWR6843ISK, can need any other hardware for to run IFD demo ....?

Thanks,

Rahul