BB Asset Management Arms and Asset Management Firms: how do the experiences differ?

How do internship/first-year ft roles differ between BB asset management arms and large scale asset management firms, assuming similar or near equivalent roles? Do you think it's better for recent graduates to begin in either over the other if they decide to stay in the path they pick up through their internship?

I know this inquiry is awfully broad, but any direction would be greatly appreciated. My goal is to get a better understand of what an excellent start to one's career would look like in terms of different companies.