Presentations have one audience. If you have 2 messages for 2 different audiences you need 2 presentations, or one presentation with 2 clearly marked sections. Using presentation A for audience B does not work, and diluting the content (a bit of A, a bit of B) results in nothing.
If you are lucky, you need to do some extra presentation design work. In the worst case, you might have to back to the fundamental positioning of your business, product, project, idea and cut one of the two options.
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