Does not make any difference. Infact I submitted the PDF copy with my application. Hard copy is not required. You can go with standard mail.I read somewhere "WES completes your evaluation they will give you an electronic PDF version of the ECA Report. The Express system for immigration requires this PDF version, you do not need the hard copy."
So we can start our after process immediately with PDF. My doubt does it make any other difference if we chose Standard Mail option and receive hard copy late?