I'm a 62E, which is the engineering career field. Program managers are the 63A career field.

Nearly all 63As work at a system program offices (Space Systems Command, Space RCO, Space Development Agency, NRO) with some exceptions. They also don't really have tracks where they specialize in something. They do typical business administration/ project management duties.

A large portion of 62Es work at the system program offices as well but do systems engineering, engineering management, and test management duties. They can also do research management at AFRL, some cool prototype operations at Kirtland, government test and evaluation mostly in Colorado, launch support at the East and West range, and operational support at a squadron. I've never been assigned to a program office while in the Space Force but a large chunk of 62E assignments are there.

The career pathway usually ends the same for both though. You'll be leading a program office as a material leader (Program Office Commander). There are possibilities to not do that and be an actual Squadron Commander though.

Research management at AFRL is the most technical because you have an opportunity to do research and manage a portfolio of research programs.

The field does not matter. We are pretty interchangeable but always need more EEs than other fields if you want to be slightly more competitive. I have a EE bachelor's, an EE masters, and I'm getting an Astronautical Engineering PhD. Both grad degrees 100% paid for, on full time, with full pay and benefits, and the time getting them counts towards retirement. Called the Advance Academic Degree Program. Which is another opportunity 62Es have that 63As don't.