From the Vatican:

1° With due regard for can. 1378 of the Code of Canon Law, both the one who attempts to confer sacred ordination on a woman, and she who attempts to receive sacred ordination, incurs a  latae sententiae excommunication reserved to the Apostolic See.

and

§ 1. The more grave delicts against morals which are reserved to the Congregation for the Doctrine of the Faith are:

1° the delict against the sixth commandment of the Decalogue committed by a cleric with a minor below the age of eighteen years; in this case, a person who habitually lacks the use of reason is to be considered equivalent to a minor.

2° the acquisition, possession, or distribution by a cleric of pornographic images of minors under the age of fourteen, for purposes of sexual gratification, by whatever means or using whatever technology;

§ 2. A cleric who commits the delicts mentioned above in § 1 is to be punished according to the gravity of his crime, not excluding dismissal or deposition.

On first glance, it would seem as though the Vatican is reserving the more severe punishment for ordaining women, rather than child rape.

I think I see it a little bit differently.  With this wording, Rome has the opportunity to deal with both of these issues in a right way...whether that happens remains to be seen, since they don't exactly have the greatest track record of dealing with pedophiles.

The first (ordaining of women) is punishable with excommunication.  "We're done, you're gone, it's over."  The people involved are no longer under the authority of Rome and Rome has no hold over them, spiritually or earthly.

The second (sex with a minor) may be punishable with defrocking and being turned over to the secular authorities.  This means that there will be earthly consequences (prison, perhaps) and they may no longer be in a leadership position within the church.

This also means that (unlike excommunication) they are still under the authority of Rome, which means that the Vatican can have some direction and it leaves the door open for repentance...penance...forgiveness...restoration.

To me, keeping these offenders under the authority of Rome keeps them accountable...and keeps Rome accountable.