Gopro hero 5 vs hero 6?

It really depends. How slowed down do you want for slow motion. If you need slow motion at 4k get the 6. Get the 6 if you want 1 / 10th speed slow motion at 1080. Otherwise, get the 5.

Doczi see one shoots 30 fps one shoots 60 fps camera people in here what should I get one is 300$ vs 500$ is there really much of a difference? not just shooting pov will be follow caming with a gimbal

Spend less get the Hero 5, you should be able to shoot 60 with the 5, just not in 4k if I'm not mistaken. The Hero6 has a few issues with video quality depending on what Res and frame rate you are shooting in. You do not really need more than 60fps unless there is some very specific reason you do. I always shoot 60, the only time I shoot super slow mo is with an FS700 only because of the End Trigger feature so I can pick and choose the best shot.