The Coleman tablets you bought are Iodine tablets with a secondary additive to remove the Iodine taste.

The Portable Aqua tablets you show are Chlorine-Dioxide.

According to the CDC, both of these will safely kill most organisms found in groundwater, with the exception of Cryptosporidium. Iodine is ineffective in reducing Crypto to safe drinking levels. Chlorine-dioxide is effective if higher concentrations of chemical is used for extended treatment times.

As for taste, most people are used to a slight bleach odor and taste from public water supplies. At the normal dose (2 drops per liter), chlorine-dioxide treated water is palatable. Iodine-treated water is tolerable but has an unpleasant taste. The taste of either treatments can be made more palatable by adding a small amount of vitamin C. The chlorine odor and taste can also be reduced by leaving treated water in open containers or pouring back-and-forth between two clean containers to allow the chlorine to dissipate. Iodine does not dissipate over time.