Which model for my Fire detection project?

I was assigned a task to detect FIre. My friend has successfully used YOLOv4, with an accuracy of about 70%. I know YOLOv4 is great, but I want to know:

  1. Can I use another model to detect fire, like U-Net or MobileNet?
  2. Which model is the better?

If you have experience in this field, please leave a comment. Thanks in advance.