Why I Ask ---> There is tons of R&D that goes into a brake that mitigates recoil to a good level. IMO a "good level" will be a reduction of at least 30%.
Also IMO ---> most brakes are simply made to look kewl so they will sell. Some brakes come with a posted summery of the R&D and the "actual" reduction in felt recoil and muzzle rise. Please remember though there is no such thing as a free lunch. When using a muzzle device there is usually a trade off. Typically it is a reduction in muzzle rise for loudness and overpressure transmitted to the shooter or bystanders.
Also ---> a muzzle brake has a closed end .... a flash hider does not. If a device is marketed to be able to do both .... typically they will only do both half-assed. --- SAWMAN