mix2match is when you can eat, say a red breakfast, a green lunch and a red dinnner in the evening, but you mustn't snack on any red or green food in between, so you snack on fruit and yogurt. It's great for when you're not sure what the choices will be or you have an urge for a particular something. The weight loss isn't any different.
success express is when you imagine your plate is a clock, and from 12 to 4 o'clock you can have red & green, such as meat and potatoes, and from 4 back round to 12 is superfree food i.e. veg (not beans, sweetcorn etc as they're green foods). The plate has to be level, so no piling the spuds up and spreading the veg out! I haven't tried this yet, but it's meant to get good results. No snacking on red or green between meals again.