The only difference between H-Free 100 PET (CHF 128.00) and H-Free 100 Home (CHF 122.00) is that the H-Free 100 PET has an additional "dog brush". It is strange that you have to pay CHF 6.00 less for more "products". This is probably due to supply and demand. I would definitely order the H-Free 100 PET, the same product with more content and CHF 6.00 cheaper. However, I am also very satisfied with the H-Free 100 Home. I would buy it again at any time.