There are some benefits to the Salomon bindings toe piece in many skiers opinions- the Oversized Spherical release. Salomon has been purchased by Atomic and changes are in the works to the Atomic style. Atomic purchased a binding company (ESS if I remember correctly) so consolidation in the industry happens. With many skis going to the "systems" a plate that offers free flex under the boot, you only have 1 choice. Race Stock skis usually at the top end offer a plate or capability of mounting any binding. As others have pointed out, each company has a claim to fame, Look turntable heal, Salomon with their toe piece (and I think I've read a 5 year warranty), Atomic with their forward of center, back of center adjustment (some women like the forward of center, some racers like the back of center feel), Tyrolia has a diagonal heal, Marker has thier toe piece sensor. The key to a binding is a design that protects you in a fall, most do that well if adjusted and set right your your skiing ability, style and weight, etc. That is unless it is a forward or backward, twisting fall that does not allow the boot to come out due to the pressure on the toe or heal piece. This is where some manufacturer's will claim that their design is better than another.
There are many reasons people may or may not like a particular brand binding- Atomic has no place to thread a ski lock through as one example of a complaint heard. It may have nothing to do with the actual binding release. Others purchase the binding that is made by the same company as their skis even if it is not a system binding requiring a match. Rossignol used to (and may still do this, have not checked lately) extend their warranty to 2 years instead of 1 if you had also purchased Rossignol binding to be mounted on them.