Historically, in CALUMO Views, the hierarchies and their members on rows or columns are cross joined. This basically means a union is shown. So, if you want to show actual vs budget across 2 years, you would get the following (because of the way a single tupleset cross joins results - which is not always optimal):
Tuplesets allow for the creation of multiple sets of members which shows a more discrete result - as each set is not cross joined with each other. The following view demonstrates this:
This video shows the process of duplicating a Tupleset and then changing the members to arrive at the result shown above.