a] RFI interference pick-up by speaker cables is not a big problem for most of us.
b] but if it happens, twisted conductors are slightly better at reducing it than braided conductors.
c] 'virtual elimination' is rather strong, reducing is a better choice.
d] from a mechanical point of view, braided conductors may be more robust than twisted conductors.
e] what matters most in speaker cables is:
total end-to-end resistance of the entire cable