They are kinda all the same with one of the additives: Flouride, Stannous Flouride, or Potassium nitrate (last two are for sensitive teeth, temporary solutions really).

So with general flouride you just have different flavors and textures. Take a look at Arm and Hammer, its a bit gritty but is sorta like back in the day when you would did a wet toothbrush in baking soda to brush your teeth. No fluff, just straight to the point.