The difference between 230 and 240 is not the expedited processing, but rather the actual transaction.
If you are buying the entire institution (there will not be a surviving regulated entity) then you apply under the requirements of 230.
If you are just buy 3 branches and the entity will still survive (regardless of whether they have any branches left or not), you would apply under 240.
If both insitutions qualify for expedited processing, that would apply under both 230 and 240.
Hope this helps.
The opinions are mine and do not necessarily reflect those of my employer.