A meta with PUL takes the labia minora to reposition and lengthen the urethra so that it comes out at the end of the penis shaft. It is precisely the urethral lengthening which will allow the patient to urinate from their penis and stand to pee.

On the other hand, a simple meta would not change the location of the urethra. This means that a patient would still likely need an external apparatus, like a specialized packer, to urinate standing up.