I had the same problem over a year ago, it was actually the number of adapters, crazy price-wise and in any case more worthwhile to take the set of 3.
But it's been ages and I would clarify again to be on the safe side before buying, the distribution at that time was only at the letters B and K as follows
GN930BWEGWW - 1 adapter
GN930KWEGWW - 3 adapters

I assume it is the number of adapters in the package. However, it is best to check with the customer service. It is not clearly documented in the description.

I have just chatted with the customer service. The more expensive one is a set of 3.