You can't make a bad choice IMO, because both are stunning. I have and love the silvertone timeless pearls, but if I didn't already have a pearl/gold bead necklace, I may have gotten the goldtone, depends.
I'm more of a silver person, but when i saw the pearls IRL, i realised that the gold goes better with the hue of the pearls, whilst the silver clashes out against the pearls and looks rather plasticky. So i got the gold!
My strands have the silver CC... I don't find that it looks plasticky. I don't find the pearls to have a gold tone personally. I prefer the silver hands down.