To reiterate another poster's comment, the The Sun Never Sets expansion contains "The Orient" and the "Strongholds" modules, whereas the Silk Road expansion contains the "Cities" and "Trading Posts" modules. BGA made an error with this post, switching the set of modules.
For context, these modules aren't new, as they were part of the older expansion called Cities of Splendor, where instead of two separate expansions, it was one expansion containing all four modules. From a few reviews I have watched, the consensus is that the "Strongholds" module was the weakest, while the "The Orient" module was the best, which is probably why Space Cowboys made those module pairings the way they did.
Aside from the upgraded artwork, here are a few rules changes compared to the older version of the modules off the top of my head. For "Trading Posts," instead of placing player pieces on a board, you are picking up tiles of those benefits from a limited supply. For "The Orient," the cards that allowed you to reserve a noble tile have been omitted. For "Strongholds," the plastic pieces have been upgraded to wooden pieces and look like ancient Chinese architecture, which definitely makes it look better on the table than the plastic pieces did. And a reminder for "Strongholds," but after you have three strongholds on a card and have done the required action of purchasing a card, you have the additional action of acquiring the card under your three strongholds, but not for "free," as you still have to spend gems or already have cards to acquire them.
With all that said, when I first saw this post, I thought Splendor had a new expansion out, but was disappointed when I found out it was just a rehash of their previous one.
For context, these modules aren't new, as they were part of the older expansion called Cities of Splendor, where instead of two separate expansions, it was one expansion containing all four modules. From a few reviews I have watched, the consensus is that the "Strongholds" module was the weakest, while the "The Orient" module was the best, which is probably why Space Cowboys made those module pairings the way they did.
Aside from the upgraded artwork, here are a few rules changes compared to the older version of the modules off the top of my head. For "Trading Posts," instead of placing player pieces on a board, you are picking up tiles of those benefits from a limited supply. For "The Orient," the cards that allowed you to reserve a noble tile have been omitted. For "Strongholds," the plastic pieces have been upgraded to wooden pieces and look like ancient Chinese architecture, which definitely makes it look better on the table than the plastic pieces did. And a reminder for "Strongholds," but after you have three strongholds on a card and have done the required action of purchasing a card, you have the additional action of acquiring the card under your three strongholds, but not for "free," as you still have to spend gems or already have cards to acquire them.
With all that said, when I first saw this post, I thought Splendor had a new expansion out, but was disappointed when I found out it was just a rehash of their previous one.