Hi. Shaving like a blade is impossible.... stumps remain, with a lot of effort and time a comparable shave is also possible with this device, but no baby bottom.... have been using for 2 years and have always bought replacement razors instead of replacement blades :)
On the function and blade attachment none. The two Pros have an adjustable comb attachment, the Pro-Pro has a stronger battery, battery indicator & charging station. In the end, they all do the same thing ;-) No, the Pros are mainly practical for those who wear a full beard, whatever form it takes. For people without a full beard, the normal OneBlade is enough.
In order for us to be able to make you an offer, we would still need to know which of the 4 trimmer attachments is defective. You are welcome to contact our customer service by e-mail with a note on this question.
I bought the body attachment separately. It is the same blade. There is a plastic attachment for it.
The razor is also the same. It just comes with the plastic attachment.