Same thing. They've been recycling the same design for years, but NASA won't let them get away with it for the CEV, because they've demanded a capsule in the program requirements.
NASA has already issued the preliminary design specs. The first CEV mockup (capsule) is already built and resides in building 9 at JSC. If NASA is insisting on a capsule design rather than a recycled Crew Escape Vehicle, then it isn't the same thing.