Q: Are there different kinds of smoke detectors on the market?
A: Yes. Ionization and Photoelectric are the two different technologies on the market. Ionization are the cheap ones you see advertised all over. We do not recommend them.
Q: Are some better than others?
A: Yes. We only use Photoelectric. Here is a good video to explain why by an independent news station. https://www.youtube.com/watch?v=zrOLxh8GuCU.