Between contouring injections and jaw Botox, which procedure provides higher satisfaction for facial lines?

I am looking into contouring injections and jaw Botox because I want to refine my facial lines.

Since both are common procedures, I am having trouble deciding which one to get.

Based on the reviews I've read, I've heard that contouring injections help with facial fat reduction, and jaw Botox is effective for cases where the jaw muscles are developed.
For those who have received both, which procedure did you feel a more definite change from and which one do you recommend?

It would be very helpful if you could share information such as cost-effectiveness, lifespan, and downtime.