Which One Will I Get

Yes.

Does anyone know whether District Offices determine beforehand whether an applicant for EAD is in deportation proceedings or not?

You'll get the I-766 Form.

I got the I-688B.

Why do you wanna know beforehand which one you'll get?

I read some time ago INS has phased in a new Employment Authorization Document (EAD), the I-766.

Will I get work authorization on the old EAD, the I-688B or will I get the newer version?

I read some time ago INS has phased in a new Employment Authorization Document (EAD), the I-766.

Will I get work authorization on the old EAD, the I-688B or will I get the newer version?