Answer:
Yes, Western and English bridles differ greatly. For one thing, they have completely different uses. For another thing, there are many types of English bridles, all used for specific events. Western bridles are pretty close to each other, although some do differ. English bridles are very complex and have many straps and different bits or reins. Western bridles are mush simpler, and do not have nose bands or chin straps. Some have throat latches, but many don't. I could go on forever listing the differences, but I'll just leave it at that.