BNC Cable is RG6 the best?


BNC Cable is RG6 the best for Digital transfer?
I received a AfterDark Clock to mate with my EtherRegen. With it came a very cheap looking BNC cable.
I'm not sure exactly what makes up a BNC cable special. I know it should be 75 ohms and shielded.
So, what about using RG 6 cable? I have the appropriate BNC fittings.

Should this be better?
And of course, why then are some of these cables so expensive?

ozzy
128x128ozzy
a double run of Sommercable BNC via T-splitters
Be careful if you do something like this.  The digital signal in these cables is very time sensitive, so if you have two conductors (or two parallel cables), you need to ensure that the conductor lengths are EXACTLY the same.  Otherwise, you will introduce timing errors on the destination when one conductor charges/discharges at a different speed than the second conductor.