I haven't tried the Nutra version, but I have tried. The old formula was a hit, and the new one is being equally well received. Lots of users are reporting a more stable digestive system, as intended.
I'm sure the Nutra brand is a solid choice as well, but more bacteria does not necessarily mean better. Plus, at the price of , it's worth a try; the first bottle will last you 30 days (with loading phase) and each bottle will last 35 after that. I am loving it. I'll let others chime in though, but you will see a few logs pop up over here shortly.