With a slightly deeper cup and more open backbore, this is a good option for a 3c player looking for a slightly darker sound without impacting range and response too much. Personally I find it a good orchestral all-rounder, but a little too tiring for theatre/function band playing. That said, you only have to look at Thomas Gansch (Mnozil Brass) who allegedly plays a heavyweight 3b to know that it is definitely possible!
Pros:
Good all-rounder
Similar response to standard 3c
Cons:
Can be hard work in "solo" (one trumpeter) settings