I e-mailed klout support to find the answer since there are no clear ones in google search results, in fact even the New Yorker published an article stating they had no clue (lol), but essentially all it affects is the klout display name.
"I apologize for the confusion. There really is no difference between being an individual influencer and a brand influencer. The only difference is that if you are a brand influencer, your brand name will be displayed in your Klout profile, rather than your first and last name if you were an individual influencer."