1) Is there any difference, other than price, in how these modules display the run/turn/brake function. My parts guy tells me the Kury module has a flashing brake function and the Harley Davidson is constant for the brake.

2) Can I wire my swing arm turn signals (yellow) to work independently of
the run/turn/brake module for the brake and strut turn signals (red).

 

I just put in the Kury module,
Pretty happy with it. Simple plug in install. Not sure about wiring independent of the module though.

 

I just installed the HD system, took longer to remove the seat then it did to plug the harness in ! lol ! the HD comes with the red lenses and works great and it was less expensive than the others I had looked at. Although, like you said it does not have the flasher for the brakes which was fine with me !
I'm not sure why you would have 2 set's of rear lights,but I am guessing you would have to run the wires separately for the yellow turn signals then use this harness for your other brake lights, gonna look like an ambulance with all that color flashing back there but I'm sure people will see you !