I'm getting a late Christmas gift and was told to pick it out. I chose a Pandora necklace because I already own a bracelet and 8 charms. I want to get a regular chain instead of one of their necklaces that look like their bracelets. I'm a bit confused though. They have two silver chains which look identical. Can anyone explain the difference. Their item numbers are #590412 and #590200. The only differences I see listed on the site is that #590412 comes in 45cm and 90cm whereas #590200 comes in 45cm, 60cm and 75cm. But the pricing on both 45cm chains is different. Is one a better quality silver or am I missing something?