What's the difference between jty-gd-ft6 10 1 detector and JTY-GD-FT810/detector?

Jty-gd-ft6 10 1 little information, it should be an old model.

Some information about ft8 10 1 was found on the Internet. JTY-GD-FT8 10 1 Point photoelectric smoke detector is made of imported photocells and based on the principle of infrared light scattering. Surface mount technology, ultra-thin design, nonpolar two-bus system, electronic coding, occupying one coding point, strong anti-interference ability, automatic compensation function for environmental change, self-checking function. Fire can be accurately identified in different environments of white smoke and black smoke. The performance is stable and reliable, and the false alarm rate is extremely low.

The two versions are definitely different, but can they replace GM? I suggest you ask a professional.