Non-Organic: Pizza Express Margherita Pizza (3.35)

Organic: Sainsbury's So Organic Margherita Pizza (3.49)

Verdict: Both pizzas weigh in at around 20% cheese, and whereas the non-organic Pizza Express variety was high in sugars, much of this can be attributed to the real tomatoes. The organic's downfall was in drastic jump in fat (a third extra) and an increased intake of calories.

Winner: Non-organic