When evaluating on how a bit will work in a horse's mouth it is important to look at how the whole bit will function as a whole and not just a singular part. When comparing these two bits, they both have a very similar mouthpiece but due to the shanks and the mechanics they will have very different reactions for the horse.
The type of bit combinations can seem endless when you think of all the options. That is why it is important to understand how each component of the bit works, independently and together. In this article learn about how different styles of cheekpieces will affect the bit.
A bit should be sized and fitted to the individual anatomic shape of the mouth as well as to its characteristic needs. The basic requirement for the correct bit choice is a healthy and properly trained horse.
Different metals and materials will provide horses of different tastes, comfort, and texture in their mouths. Some horses will prefer different types of materials over another. When you see your horse being able to comfortably hold the bit without excessive chewing or evading it means you are on the right path.