Why do the import image paths differ in different environments?

Why do the import image paths differ in different environments?

The customer reported that the insert images in solution can't display properly and I made a comparison in my own environment.
Customer's image link is like SDP_HOME/inline/WorkOrder/... while mine is like SDP_HOME/inlineimages/WorkOrder/...
So what's making this difference and does it have anything to do with the display problem?