In all my experience selling home video equipment, the difference is probably negligible. Unless the cable was made to a really low spec, you probably won't be able to tell any difference at all. Gold plating is more for show that true improvement in signal...it's a marketing thing.
Now if we were talking high end amps, I'd probably be saying something else. But that's not the case here.
What did you buy, from where, and how much?