We used God's Design this year and plan to switch to Apologia next year because many of the families in our homeschool co-op feel it is a better quality product.
1) Apologia books have around 13 long chapters, each on a single subject so you get really in depth for that subject over a two week period. They have a lapbook that you can purchase and print out for written narration. It seems to be very CM. However, then you only get one topic for the whole semester. I think you would need two Apologia text books per year. If you do science two or three days per week.
2) God's Design books have around 34 short chapters, so you can do two chapters per week. Each chapter has three sections, one for each age group. I didn't feel like there was enough material for me to work with at home with my kids who love science. It is great when you are teaching several kids in a wide age range, as in a family or homeschool co-op. It isn't designed to be CM style, but basically they are just presenting information and you can have your kids narrate, etc. so it is flexible. They plan that if you are covering Earth Science one school year that you work through their three Earth Science text books. Geology, Weather and Water, and Our Universe.
I hope that helps! Feel free to ask me any specific questions because I have one of each textbook sitting on my desk