Most can't decide between the sterling silver or the rose gold (copper).
Just for your information,both sterling silver and copper will develop a patina over time. Sterling silver is much easier to take care of compared to copper as sterling silver oxidizes much slower than copper.
PLEASE TAKE NOTE:
Copper is a beautiful jewellery and has a nice rose gold hue to it, but because of its nature copper will tend to develop a patina ( tarnish/ rustic looking ) . To clean copper please have a look at this video and this article.