Hi,
It'll depend on the site, but in theory, I'd assume you're correct in most instances because of the following;
This is assuming the site is a basic eCommerce site;
- You could add a product to the basket from the product display page (This session now qualifies in segment B as I have viewed the product page)
- You then abandon the site, returning an hour later in a new session. In this new session, you go ahead and complete the basket transaction (Again, this session qualifies in segment B as I am now purchasing this product)
In the above scenario, I have 2 visits in the "OR" segment (segment B), neither of which fall into the "AND" segment (segment A), as a result, segment B in theory should always be higher than segment A.
Any visit that falls into segment A, should also fall into segment B, as well as the above instances, which won't fall into segment A.
Thanks,
Chris