The Velo Orange headset will work with either a JIS or ISO crown, but the crown isn't the only sizing difference between JIS and ISO headsets. JIS cups are 30.0 mm in diameter. ISO cups are 30.2 mm. Some people say you can press ISO cups into a JIS head tube, but my experience is that it's not ideal. It can take a whole lot of force to jam an ISO cup into a JIS head tube -- potentially enough to damage the cup or even the frame.

The VO site identifies their cups as EC30, which is ISO. The SHIS size for JIS cups would be EC29.