The oyster shucking tool you choose depends on the type and size of the oyster that you want to shuck. The key considerations, regardless of the type of oyster, are design of the knife, the material of the knife, versatility and comfort.
The design of the blade should match the type and size of the oyster. For example, knives that have a sharp edge that comes to a point are ideal for shucking Island Creek oysters, because less force is exerted to break open the oyster shells. The style that you use when shucking oysters, whether it is hinge, side or bill, is also just a matter of personal preference.
Oyster tools should be made from the highest quality material so that they can serve you for a long time. A flimsy knife easily breaks after shucking a few oysters. This could be dangerous as you could suffer a nasty cut.
The oyster knife should be a comfortable size and the handle should also be comfortable. This makes it easier to shuck the oyster without risking any cuts. Some people prefer the comfort of rubber handles, while others like the firmness of wooden handles.
Most chefs have a different oyster knife for different types of oysters. However, the best knives are versatile and they can shuck a variety of oysters of the same size.