The correct way to say this would be "From where does this .... come?" although most native speakers would say "Where does this ... come from?" So if you want to sound more like a native speaker say "Where does this ... come from?" All 4 of these are technically correct although savor is rarely used as a noun. Savor is used more often as a verb in situations like "He savored the taste of the soup." The word most likely to be used by a casual native speaker would be smell. "Where does this smell come from?" or even more likely, a native speaker would say "Where did that smell come from?" Because even though the smell still exists, the speaker is asking where it came from (in the past it came from somewhere and it is still here now)

Assume a western man with a wife or girlfriend If he met her and liked her perfume, he would say "I like your (or the) scent. New perfume?" If he knew her well, he could also say, "You smell nice." Strangely enough, he probably wouldn't say "I like your smell." Don't ask me why this is. "Aroma" would be used mainly in a positive way for food and sarcastically refering to somebody who smells especially bad. If he wanted to break up with the girlfriend and get hit in the process, he would use "aroma" to describe her perfume. "Savor" is used mainly as a verb meaning to relish - "I just passed all my tests! Give me a minute, let me savor the moment." "Savor" as a noun also is a synonym for smell, but used very seldom. "Scent" is also used in the case of an animal tracking some prey or food.