Question about Geberit Unifill

I can't tell you what the difference is, but it was the complete part as shown in the photo

The actual filling valve is identical (even the product photo is the same). The difference lies in the accessories. The cheaper version only has white plastic caps to cover the screw connection on the cistern. The slightly more expensive set seems (at least according to the pictures) to have metal caps included.
However, this can only be deduced from the pictures. I bought the cheaper model some time ago and am completely satisfied...