It seems (at least for the passes that I checked) that the 30 flights for small businesses is priced exactly three times the price of a 10 flights for an individual.
So, I guess the only advantage of the pass for small businesses is that it can be used by up to 8 people, vs. 3 for three individual passes.
As to price, looking at my typical pattern, I find that buying early, I get prices lower than the passes. However if most of my travel would be last minute, the conclusion would differ.