Question about Philips Avent Sterilisator

So in the Galaxus shop there is only the SCF293/02. I would assume that if you have found the 293/00 somewhere, then it is simply the older version of it. More important is the difference to the 291/00, which can also be bought in the Galaxus shop and is cheaper. Compared to the 293/02, the 291/00 does not have a dry function. It is precisely the dry function that makes the appliance significantly better.