LONDON, May 14 (Reuters) - BHP Chief Executive Mike Henry said that Anglo American investors need to consider the merits of his company's bid for its smaller London-listed rival, seeking to drum up support for a proposal that has been rejected twice.

The CEO of the world's biggest listed mining group told investors at a metals and mining conference in Miami that Anglo shareholders must make a "determination" on the benefits of a combination of the two companies and which team they think has a better track record of executing projects and delivering returns to investors.

Anglo on Tuesday laid out plans to refocus on energy transition metal copper while spinning out or selling its less profitable coal, nickel, diamond and platinum businesses.

(Reporting by Felix Njini and Clara Denina Editing by David Goodman)