1. When individuals leave the organization for conscience reasons, it is evidence that God is shepherding and protecting the flock by doing a sifting work. When people leave another Christian religion it is evidence that the religion is morally corrupt and unable or unwilling to provide spiritually for their members.
2. When a Christian from another denomination lies, he is acting according to his own disposition being from the father of the lie. When a Jehovah's Witness lies, he is proving his loyalty to Jehovah and fulfilling his sacred obligation to engage in spiritual warfare.
3. During times of rapid growth the organization claims this is evidence of Gods approval as he "speeds it up in his own time". During times of little or negative growth, the organization prints that this is evidence that the end is near because it appears that the harvest work is almost over and the waters are drying up.
4. When a Jehovah's Witness is martyred, it is seen as following Christs example and fulfillment of Scripture. When a Christian of another faith is martyred it is seen as a misguided, albeit admirable exercise in a form of faith but ultimately proving false to its Source.
4. When the organization prophesies falsely it is due to man's imperfection and an eagerness to see the new system. When another faith prophesies falsely it is proof that they are a false prophet in fulfillment of Christs words about the presence of many false prophets during the last days.
5. When other Christian faiths experience growth it is because the Devil is misleading the entire inhabited earth. When Jehovah's Witnesses experience growth it is undeniable evidence that Jesus is actively leading the organization.
6. When other religions are exposed as fraudulent and a menace to society and they lose certain privileges or status within a particular context, it is because God uses the governments as his executioner of justice. When the Jehovah's Witnesses are exposed as fraudulent and a menace to society and they lose certain privileges or status within a particular context, it is because Satan owns all the governments; else how could he have offered all of them to Jesus as a temptation?
7. When the Catholic Church engages in protecting Pedophile Priests by hushing up the matter it is evidence that they are the filthy Harlot. When Jehovah's Witnesses don't notify police of charges of child molestation it is because of their willingness to allow Jehovah to handle the matter in his due time; thereby displaying faith in the ultimate JUDGE.
8. Jehovah's Witnesses claim to have no clergy and hence are totally unlike Christendom's rulers who get special reverence and lord it over their brothers. When asked why the WT many times don't report criminal charges to the police they claim it is because it's a violation of the clergy/laity relationship.
9. When a Jehovah's Witness is unrepentant he is disfellowshipped, branded unfit for association. When the organization is unrepentant of its sins and people find it unfit for association and contentiously leave, it is because they are full of pride and refuse to wait on Jehovah.
10. When a Christian of another faith celebrates Mothers Day they are following ancient pagan practices and giving undue attention to someone. When Sisters wear a wedding ring which clearly has pagan origins and draws attention to her status, it is evidence of honoring the divinely inspired institution of marriage.
11. When a Jehovah's Witness defrauds another Witness, it may be brought before the elders for possible social sanction if guilty. When a Christian of another faith defrauds a Witness he is often times encouraged to sue the pants off him and squeeze him for every dime.
12. When other Churches support the UN it is evidence that the harlot is fornicating with the Wild Beast. When the organization officially agreed to support UN objectives it was because they needed "access to their library".
13. When a different faith-believing relative shuns their Jehovah's Witness family member, it is fulfillment of Christs prophecy concerning the breaking up of families when someone starts to believe in Christ. When a Jehovah's Witness shuns his different believing relatives, whether they believe in Christ or not, it is seen as an action necessary to keep oneself without spot from the world.
No matter what happens, every event in Jehovah's Witness life is seen as evidence that they have the truth and others will simply be destroyed by God.
Perhaps others can provide more examples of having it both ways. I'd argue it is their defining characteristic.