In most big B2B enterprise sales dialogues the client understands the market, knows the key players out there, knows the issues she is trying to solve. They don't care about margins, market sizes.
In most investor pitches, the potential investor knows the broad market segments that sound similar to the one you are operating in, knows how big they are roughly, knows major competitors. They are less interested in specific feature comparisons.
Presenting your differentiation, what makes you special, is different to each of these audiences.
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