Space Policy Online's report on IAC2014 Day Three: Stratolaunch and Sierra Nevada Courting on Dream Chaser mentions that:
... Stratolaunch would be used to launch a 75 percent version of Dream Chaser into low Earth orbit (LEO).
And goes on to somewhat elaborate:
A Stratolaunch-Dream Chaser system envisions using Stratolaunch to launch a 75 percent version of Dream Chaser into space with cargo or two-three crew. It could launch and return to the launch site within 24 hours in a “responsive space” mode. It could take off from anywhere in the world and deliver cargo or people to any inclination orbit and, with its cross-range capability, land anywhere there is a runway that can handle a 747 or A320 aircraft.
But I didn't find any further information on what exactly is meant with these "75%". 75 percent of / by what? Of its size? Carrying capacity? By volume? Time supporting orbital activities?
So, failing to find further info on this so-called 75 percent version of Dream Chaser, short of what the linked article mentions about the differences with the full-scale Dream Chaser that Sierra Nevada competed with for NASA's CCDev / CCtCap, i.e. that the smaller scale version will support a two to three crew flights only, how else will it differ from current Dream Chaser design?
Wouldn't that mean, for example, it's basically going back to the HL-20 Personnel Launch System design and using Launch Escape System (LES) adapter instead of integrating LES into its body? 75% also can't refer to supported crew size since the HL-20 was meant to service up to ten astronauts, the version of Dream Chaser that SNC competed for NASA's CCDev / CCtCap would have serviced seven, and this new version is supposed to service up to three astronauts. That's more than half the reduction in crew size.
So which new design features would this "75% version" keep from its bigger brethren (Dream Chaser / HL-20), and which of its systems would go back to the drawing boards or have already undergone change?