Yes there are two different products Homozon and Homozone. Homozon has been used safely for over 100 years. It is effective and has been used to treat many different kinds of illnesses as well as used as a bowl cleanser.
Homozone is a copycat of Homozon, I read one post of a women claiming that she was cured of illness using Homozon(e). Though I would recommend using Homozon as that there is more dependability in the product and it has been used to heal many people (including in the treatment of cancer).
Other oxy products include : colosan, oxy-cleanse, and colozone.
As for the Oxypowder info, I read different posts and forums about the product. Many people shared having negative reactions. Sometimes the people said the company told them to keep taking it, hmmm...I hope they know the difference between a normal cleansing response (loose stools) and a negative reaction to the product. One woman on curezone shared symptoms that looked like a kidney reaction, I gave her the same opinion - stop taking it! There is a difference between a cleansing response and a negative reaction. Also, stuff from the manufacturers guidelines made me uncomfortable.
Now this is just my opinion, feel it out for yourself.