How is it a different comparison? If you knew whether or not you'd need an emergency c-section, you'd never have any emergency c-sections. There are four types of labor:
1. Unassisted (with and without medication)
2. Assisted (vacuums, etc.)
3. Scheduled c-section
4. Emergency c-section
The problem with #4 is that it often happens after attempting 1 and/or 2 unsuccessfully. The baby is in a much worse position, sometimes medically and often physically within the mother's body. You can't compare 1 and 4 without also comparing 1 and 3, 3 and 4, etc. Everything is interrelated.