@Spencer Hsu neighborhoods can be distinguished by economics and crime(Trulia Green - Red).  

I’m using RealEstateABC.com to find comparables , and I know I can’t cross major roads to get my estimate for the property but how exactly do I distinguish major roads on the softwares map?

However, it's also worth noting that one can distinguish oneself by being tough but fair.

What distinguishes an A from a B and a B from a C? 

It helps feed the ego of the poster :)Seriously though its a quick way to help distinguish who is providing value to the community.

A couple things aren't clear from your post.First, you distinguish between condos and apartments.

Those areas are also very distinguishable, block by block. 

Back in the day, the Goodrich Tire Company distinguished itself from the Goodyear Tire Company by saying "we're the ones without the blimp" and Avis competed with Hertz by saying "we're number two, we try harder."

However, selling your contract for a markup is pretty hard to distinguish from a net listing - and as I'm sure you know, that's illegal in MA (and I think in all 50 states).If you offer on a property for yourself, you must clearly disclose that you're a licensee. 

I am a property manager (I like to say rental investment manager to distinguish ourselves from the rest.