Downpour is more... Free roam. It takes the aspect of town travel and adds, about, up to 15 'sub' missions, with the five main mission areas you go to in Downpour known as main (which are one way or another all related to the story and... Specific endings and even past lore). Silent hill has a good set of different psychological monsters (which I love with a passion, as they speak story in themselves), which are all challenging in themselves. If you watched the trailers, there are monsters that stun with screams, agile monsters, monsters that are stealthy and strong, somewhat invisible monsters, and so on. Although there are only actually two 'boss' monsters, if you look at the monsters and understand the story... They all make sense, and although may not be great compared to others they are good at what they represent, with both the main character and others.
All weapons, even guns if used for melee, are vulnerable to break. They have many puzzles and items to find, most puzzles are secondary ('sub' missions). The best part? You can choose a separate difficulty for both the monsters and puzzles, so the types of players out there can be more satisfied, for those who prefer the puzzles and/or fighting.
Downpour, although lacks done things that other silent games had that made them good, was still good none the less. Although they have no monsters that are of any other games (except in one endings out of... Six), nor any characters from other games that are primary (although a few that are from other silent products that were brought back, such as the mailman seen in the trailer), the game was a good game. Not a good sequel, but a good Silent Hill game; it is a game of its own, like many silent hills (1, 3, and shattered memories are the only true sequels, in my opinion... And silent hill zero).
I recommend to reserve opinions when you actually reach the town... Takes a few missions to get to the city. Keep your mind open, your arm ready, and your balks tucked and secured. Not scary as Amnesia, but frights, surprise, and tension that Silent Hill was known for me was Leo away... Don't run out of weapons.