Siren 1-2 aren't clones of Silent Hill, they have vastly different gameplay loop.
Both games are basically adventures with stealth elements, they don't have a strict inventory/resource management (you die very quickly, in case you survived the encounter your health will automatically regenerate, missions are short so there's no need to conserve ammo because it doesn't transfer to the next mission). I finished both games last year and did a
small write-up.
Blood curse is a streamlined popamole remake of the first game, with link navigator removed. You basically play it as a standard stealth/action game and progress from one mission to the next one. I was so disgusted I never managed to complete it