The 2-bottle bundle mentions 'some bonus content', and the page does not say what that means.
The 3-bottle bundle names two digital guides and the 6-bottle bundle names all three. The 2-bottle bundle gets no count, no titles and no format. It could be one guide, a shortened version or something else entirely; the page does not say.
It also does not say how the content is delivered or whether there is any time limit on access.
Give it no value when comparing prices. If it arrives and is useful, that is a bonus. If the bonus matters to your decision, ask the seller in writing which item is included, in what format and how it is delivered, and keep the reply.