Well, this again a thing, that need to be consider - in space (sorry, IN SPACE!!!!).
KE energy is very straightfoward in theory, the projectile hit the target, target face X amount of energy. The CE energy is the same, explosion occur, target have to endure X amount of energy from the blast.
But if the projectile are hard and the target is soft, then the projectile fly through the target and not deliver it's energy. Yepp, the target have least two holes, but still, the Kinetic Energy not realized fully on the target.
The same occur in the case if we have CE warhead, and our ship have certain blast-proof outer shell (like whipple-shield, aka spaced armor).
So actually there soooo many factor we need to consider in a hipotetical space war and we cannot say the KE is much better than CE in this field of battle...