The MagSphere and the MagBounce are both diffusers, but they have some differences that make them ideal for certain situations.
First, the MagBounce.
The MagBounce acts like a soft box for your flash by delivering soft light with wide flash coverage. It increases the apparent size of your flash by 300%, and its white silicone texture diffuses light without significantly decreasing output. Another cool thing about the MagBounce is that it gives you the flexibility to shoot in both landscape and portrait orientations. You get 360 degrees of rotation in 4 different configurations.
A great time to bust out the MagBounce would be when shooting in a building with high or dark ceilings. If you can't use your flash to bounce light, throwing the MagBounce on will immediately solve that issue. There are also many photographers who are using 2 MagBounces (off camera) to capture family formal shots at weddings, and table shots during wedding receptions.
Second, the MagSphere.
The MagSphere, on the other hand, is an omnidirectional diffuser. This means that you can point it directly at your subject, or you can use it to bounce light from ceilings or nearby walls. It increases the size of your light-emitting surface by over 250% for a softer glow over a bigger area. The MagSphere is extremely versatile, and can be used with our MagGrid for even more control.
In this video, Trevor shares some tips on how both the MagSphere and MagBounce can be used on your next photo shoot: