What makes some companies more profitable than others? What are the similarities and differences between profit and profitability?

What makes some companies more profitable than others? What are the similarities and differences between profit and profitability? Provide real-world examples to support your answer.  Include examples from the Businessweek articles as well. Please proofread your work.  Run a final word usage, grammar, punctuation, and spell check.  Use the QUOTE ORIGINAL feature in all posts in the DQ threads.