Yes, they are the same according to www.chess.com I was reading and www.chess.com says that the only difference is silver is monthly and gold is once a year. So you should point that out to the owners of the website. It is probably an oversite on their part considering their goal to be the best chess website.
A silver membership gives 2 free days per month, whereas a gold membership only gives 10 per year? Shouldn't gold give 24 per year?