In San Francisco proper the discrepancy between 2 and 3 units is bigger I assume because of condo conversions.

I mention all this because it's not a jammed up, slap dash space but from an insurance perspective do you think I should be concerned about the interior inspection and the 2 family zoning but 3 separate tenant discrepancy?  

Yea the thing that was confusing was that the listed rentals on Zillow or Redfin had pretty big discrepancies in price while they appeared to me to be of similar quality. 

The provisions in the second contract govern the final close so you have to check for discrepancies that would invalidate your contract's provisions with the seller.

This discrepancy can strain property owners financially.I onboarded a customer and later found out he was way over the set furnishing budget.

Overall, it’s an excellent solution for smaller portfolios because you can easily spot any discrepancies.

I'm curious if this discrepancy is typical of other regions as well.How accurate is the data on this site?

First off too many discrepancies. 

I've been reading Brandon Turner's book, The Book on Rental Property Investing and am noticing a discrepancy.

Even though it is not accurate in all markets, recognize there are markets worse and better than 50% rule and be able to justify any discrepancy.