Difference between #1b and #2 (Wawa) ?

Is there much difference between colours 1b and 2?  Particularly in the Wawa? 

I normally wear a 1b in human hair, but VixenWigs are out of stock in that colour in the hair I want so I was thinking of ordering a 2 instead.  However, never having seen the two colurs side by side I'm not sure if it'd be too light or not. 

I've spent the past few hours reading over all the Wawa threads and remember reading somewhere that the dark shades were darker than other brands - can anyone confirm this?

Thankyou x