I imagine installing an 8PDT would be a more complicated job. But then, I have never drilled a hole in a case with the intent of it looking nice, either.
If you already have a prepared PCB, it probably won't make
that much difference either way, though you'll need to wire more points on with the PCB method.
If you don't have a prepared PCB, then making your own & installing that will make it a quite a bit more complicated than installing just the 8PDT switch.
It'll be much easier to make it look "nice" with the PCB method, as the 8PDT switch selection is extremely limited.