yeah, though a lot of them work in pretty different ways which is nice.
Do I want to be a Wizard with a sword, or a wizard with a Sword (Magus)? Well, Wizard is good at the magic, Magus is good at the sword but both do a little bit of both.
It is funny though that two different classes can accidentally make the same character mechanically (Pretty Much) but also two of the same class can also make completely different characters mechanically.