They'll definitely sound different, but only you can judge if they're better. But if you plan to do a double biwire, I would definitely use the exact same cable for both runs, and not mix them.
2 runs of KK 8TC or 1 8TC and 1 4TC
I have original Silverline Sonatinas, Bryston B100, and Sim Audio .5 cd player. Will the Kimber Kables be overkill for my simple set-up? Any and most suggestions / advice welcome. I am currently using Morrow SP4 bi-wire.