Just how old is Billy Graham? Karol led a religious life since he was a teenager when he was called to God. He wasn't leading a life of Christ only for the last 26 years!
Graham actually entered ministry before the Holy Father as I understand it - Wojtyla was not ordained until 1946 (in fairness, he would have been ordained sooner save that he was dodging Nazis). Graham began preaching in the 30's.
We can say both men devoted pretty much their whole adult lives to Christ. The chief difference is that much of Wojtyla's early ministry was confined to theological education and ministry in the Krakow archdiocese. Graham was not limited by any geographical boundaries.
That's just a reflection of the ecclesial differences between the Catholic and Baptist traditions.
I think Kirkwood was referring to Graham as globe-trotting evangelist, which began around 1948. John Paul's travels didn't begin until almost 30 years later.
Dr. graham is 80 something, I believe.