1)All probiotics emphasize the CFU count. CFUs, literally colony forming units, is the number of live probiotic bacteria
2) Would probiotics with more bacteria a better option?
Not necessarily. What matters is the survival rate of the bacteria as they make their way to your stomach. What matters is how a probiotic has been prepared or what procedures do they taken to ensure a good survival rate of the probiotics.
3) Probiotics are not regulated by the FDA in the U.S.
4) It is said that certain Probiotics have specific benefits to our stomach.
Reference: Did You Know: Having a Higher Number of Probiotics (CFUs) Doesn’t Make it Better