I'm not sure if it is the strength of the fluoride that matters tbh; most of the anecdotal evidence says that it has to be crest toothpaste to be most effective. The only difference that I can find between crest and 'bog standard' toothpaste is that it contains stannous fluoride as well as sodium fluoride, it is also an ingredient in Oral B pro expert toothpaste.
Whether it is that that makes a difference or not I don't know.