>>63967478
I have a Paki and an SP5 and while the Paki *did* require some troubleshooting to get it to work flawlessly (the major culprit was the old geometry ejector it came with), it now works just as well as the HK.
Also I was an early adopter and today's clones should run just fine out of the box.
There's no functional difference, just some nicer welds and better fit+finish (and maybe some % in barrel life but let's be real here, if you're waffling over a $3k purchase, you're not shooting the gun out in your lifetime).