true story, fast twitch muscle is alaways more "tone" then slow twitch, simple muscle fiber basics. And off course low body fat means more defination, but those kenyans that run out in the desert certainly do not look the same as the nigerians who are sprinting through the jungle. ( two extremely differnt muscle fiber make ups.
As for higher reps, typically when you do higher reps you go at a faster pace, increasing heart heart, and output, buring more calories. Lifting weights make you build muscle, muscle is mass, and mass is weight so if your going to lift heavy, your going to have to do an equal amount of cardo to loose weight, i see plenty of chunks in the gym, guys are huge, but since all they do is lift heavy they dont seem to loose the weight.