guess I'll answer my own question lol, I bought a 400T on sale this evening,
have not used yet or put together, tired ;)
also since asking this question I saw on other websites under specs, edge cleaning listed for the 200R and the 300B so I am assuming they all have about the same ability in this area.
I will say this , that I tested B and T in the store and T did seem to have more suction on high power but B was really good too. quite adequate!
I should put this on review and eventually wiill but have been researching and looking for new vac since before TG and very tired, I knew more than the salesman LOL.
the things that really sold me on the T (top of the line model)400 was being on sale for just another 75$ including tax, was the window that shows shows you the level of suction you are using,L, M, or High.
on the blue,300, you do not have a window and just have to go by hearing and feeling for diff levels, they both have a window with big letters telling you the carpet or vacuum level height.
the extra tools are cool ,the light didn't even impress me all that much, we were in a well lit area though, it did impress my husband.
I highly suggest watching the videos on the LG offfical site sent in by owners. very imformative and some are funny.