if you are one, you are not the other (type of lawyer), in same vein as dentist will never be GP or neurosurgeon or dermatologist and vice versa. you also don't see linux admins leading development of some software projects
Not really. They all went to law school and passed the bar. Of course, there are tiers of school, class rank, and clerkships that perform a sorting function. Law has pretty strong credentialing mechanism.
And often have spent a lot more time in relatively low-paid training.
And lawyers are at least somewhat bimodal (though maybe trimodal). White shoe firms, corporate lawyers/successful private practices, everyone else.