What is the difference in PB8 Acidophilus and Probotics

Hi all,

Does the PB 8 Acidophilus work as well as all other name brand probotics? I notice there is such as price difference in all kinds...How do we pick? Which is better for us? Once I bought the Costco brand, but I'm out and won't be able to go get them due to foot surgery of my right foot. Costco is not close by me, but the vitamin shoppe is.

Thanks in advance for all the info I can get for now!