All I can find are studies that say both are safe and effective:
Efficacy and safety of a combination of selamectin plus sarolaner for the treatment and prevention of flea infestations and the treatment of ear mites in cats presented as veterinary patients in the United States
Safety of concurrent treatment of cats with fluralaner and emodepsid–praziquantel
Neurologic Event Potential and Bravecto, Credelio, Nexgard, Simparica.
But both are required to have an insert saying they may cause neurological events, which means their original trials must have shown that. I can't find any info on how often it happens though.
It does sound like they both will do a good job of getting rid of fleas and ticks though.
Efficacy and safety of a combination of selamectin plus sarolaner for the treatment and prevention of flea infestations and the treatment of ear mites in cats presented as veterinary patients in the United States
Safety of concurrent treatment of cats with fluralaner and emodepsid–praziquantel
Neurologic Event Potential and Bravecto, Credelio, Nexgard, Simparica.
But both are required to have an insert saying they may cause neurological events, which means their original trials must have shown that. I can't find any info on how often it happens though.
It does sound like they both will do a good job of getting rid of fleas and ticks though.