Why was there such a funding difference for the CCtCap between Boeing and SpaceX?

This funding difference was mentioned during a news story discussing the Starliner issues…

Boeing Starliner: Received approximately $4.2 billion to $4.8 billion in funding to develop its capsule.

SpaceX Crew Dragon: Received approximately $2.6 billion to $3.1 billion to develop its capsule.