Improved Sense: Scent and Olfactory Booster Comparison, So, what rating (1-6) of "sniffer" would Adept: Improved Sense Options

[CanadianWolverin...]

So, there I was, reading through Sensor Packages when I came across:

- Olfactory Sensor (Rating 1-6) table page 325 / description page 326

Olfactory Scanner: The olfactory sensor picks up and analyzes the molecules in the air. It works the same way as the olfactory booster (p. 331)

So off to page 331 I go to see:

Olfactory Booster: Known on the street as a "sniffer", "cybernose", or "cybersnout", the olfactory booster enhances, identifies, and records smells (and can play them back later). This opens a completely new world of sensual information for the user, because smell carries much more information than a normal metahuman body unconsciously produces odors corresponding to emotions (joy, fear, anger, etc.) Further the olfactory booster can continuously analyze the composition of air and set off an alarm if it picks up traces of explosives, ammunition propellant, or various substances used in biological and chemical warfare (see Scanners, p 254). A cut-off function allows the user to completely ignore intense odors. The olfactory booster is usually linked to the user's PAN to create an even more thorough AR experience.
Apply the olfactory booster's rating as a dice pool bonus for any Perception Tests involving smells.

So, I have a character who is an Adept with Improved Sense: Improved Scent page 188

Improved Scent: You can identify scents in the same way as a bloodhound. You can identify individuals by scent alone, and can tell if someone whose scent you know has been in the area recently with a successful Perception Test. The strong smells of most sprawls impose modifiers on the use of this sense.

That reads pretty powerful when compared to the above, I would think being as good as a Bloodhound is a pretty bad ass rating, but how do you think they compare? Is the Improved Sense: Improved Scent at rating 1 or higher when you use the power points on it? Do you have to buy it more than once to get it higher like as if it was a higher rating Olfactory Booster?