You really can't see the difference between them?
The Japspeed one looks like I made it with one arm tied behind my back and a blindfold on. Not forgetting Japspeeds "Legendary" fitment
I had a pop charger on mine, it was great for the cost but I changed it for an ARC one eventually. If you can spare the cash then definitley get the ARC one, makes the most amazing sound and its much better looking.
Popcharger
ARC