Body RX
Program is divided into 4 6-week cycles. 1 (get strong), 2 (get cut), 3 (lose fat), and 4 (maintenance).
Nutrition
Proteins and carbs are divided into GREEN (okay), YELLOW (controlled), and RED (no-no). GREEN carbs are veggies; YELLOW carbs are starchy veggies (beans), bread, pasta, etc.
6 small "meals"/day. 8 glasses water. 1 free day.
Shaping strategy to increase protein, decrease YELLOW carbs, and increase fiber. Goals are provided.
Weight training. Aerobics is optional. Author doesn't think aerobics do much.
4 days lifting. One area per day. 5 exercises per area. No rules on rest days.
Day 1: Chest & biceps
Day 2: Back & triceps
Day 3: Legs
Day 4: Shoulders & abs.
Shaping strategy increases sets, increases reps, and decreases rest times.
Bottomline: Both BodyRx and BFL are very similar with by-the-numbers programs for nutrition and exercise. BFL emphasizes motivation more while BodyRX emphasizes ramping up to protein and fiber goals. Both recommend supplements.
Neither offer highly detailed weightlifting 'how to,' sets training goals, women's specific concerns re pregnancy/menses, common medical conditions, common medical tests, shopping/cooking skills, or lots of recipes. I think medical testing is important because even lean marathon runners get heart attacks.
Both programs work. Both programs will have similar high failure rates because many folks are unwilling to save their lives at the cost of not having a double bacon cheeseburger.
If I had to pick one, I'd pick BFL since it is simpler. I learned from both.