I can't remember what the formulation of the other potassium was.
Potassium Citrate max dosage allowable in the US is 99 mg
When I looked up the differences (when I still had the other bottle) they were comparable
I can't find my post about it but here is one that says a similar thing http://www.3fatchicks.com/forum/4676969-post38.html
So the citrate needs fewer mg than the bicarbonate for the same "dosage", basically
I needed new supplements today (vitamins and Cal-Mag). My coach told me that they changed the other supplement (potassium-calcium), but also changed the salt. The new salt has potassium added. She's a dietician, and she wasn't sure what the exact reason for the change was. I still have plenty of the original since there are 100 in each bottle. I hope to be phasing out about the time I run out.