The smoked salmon spread combines the smoked flavor of salmon with the creaminess of the cheese. While cold-smoked salmon would add to the flavor, you can always opt for hot-smoked salmon, or even lox if you prefer more body to the fish or more briny flavor.
You can adjust the quantities of ingredients as per your taste. As smoked salmon tends to be a bit too salty already, there is no need to add salt. If you need a flavor punch, try adding rosemary, thyme, or garlic powder.