The quad cab has a smaller back seat and a larger bed, the crew cab has a larger back seat and a smaller bed. To compare them you can go to http://www.ramtrucks.com/en/2011/ram_150... and select the Build My Own option from the bottom of the page.
Heart muscle thickening (called cardiac hypertrophy) can be a healthy response to exercise and pregnancy; however, it often occurs in people with high blood pressure, diabetes, heart failure and certain genetic conditions.
If you took Fen Phen and then had thickening of your heart valves, you should contact a Fen Phen lawyer to see if you are a candidate for filing a lawsuit. Fen Phen has been associated with lingering effects on the heart that can take years to develop.