One thing I noticed in your side shots is that your quads LOOKED a lot smaller than the dude on the left, but on the front shots they looked the same size.
There's a cool trick when doing side shots to not only make your legs look bigger, but to bring out the quad/ham seperation as well. It's tougher when you are taller though. Basically, you squat down so that you can press your front thigh into your knee. Using your back knee to press the inside of your front leg, the result is your front leg get's "spread out". However the audience and judges can't see that it has become thinner since they only see the side which consequently has become much larger and more detailed. I could see in the side chest pose specifically, the guy to the left of you used this technique.