I compared the to Pro to APA little bastard and a pprecision armmennt hyper tap and I thought the ti pro five was the best
There are some studies out there that have shown the diameter of the break also helps in addition to the number of ports so you could also look at muzzle, brakes and more
Hope this helps you do some initial analysis comparing brakes.
With a big cartridge and lots of gasses created from the larger powder charge, generally you want ports in the brake with larger port holes for gas to escape and larger surfaces that face towards the rear for the escaping gasses to push on. If you look at 50 cal brakes, you get the idea because the brake is much wider than the barrel. The port surfaces are significantly larger.
Also, a larger diameter brake with the same ports will give more recoil reduction than the same brake with smaller diameter.
Brakes work by using the escaping gasses to push against the ports, which moves the rifle forward. think about it like water from a high pressure hose pushing debris on the concrete.
Don't think about it like how water pressure pushes the hose backwards, that is not what happens. I used to think about the brake ports like a rocket blast propelling a rocket forward, as if the escaping gasses from the ports were like a rocket nozzle. But, that is wrong.
Brake effectiveness is a balance between making the rear facing edge of the ports big enough to transfer the energy from the escaping gasses but also have the port large enough to keep the flow moving without stagnation. If you imagine it like water, if the water starts puddling, then the new water hitting the puddle reduces the efficiency of the water jet.
More ports creates more surfaces, but it looks like 4 ports is the where the benefits of one more port gives significantly diminishing returns. Larger surfaces like the slab brakes give more area for gasses to push on, but the gasses need to escape so it doesn't puddle. That is why the port size is generally larger.
There are also diminishing returns with the slab brakes, because you want as much of the high pressure gasses to pass over it as possible without the slower gasses stagnating in the port preventing more high pressure gas from pushing on the port surface. Again, four ports seems to be the most effective.
The above is why the smaller style narrow circumference radial brakes create more blast but don't reduce as much recoil reduction because the actual surface of the port for the gasses to push on is very small and the size of the holes are so small that gasses stagnate.
