[kschua]

Likewise, we don't have a full life to judge Bill Gates by.

As both of them are of the same age (actually Bill is younger in terms of months), it is a perfectly valid comparison as to how far both men had come at this particular stage in their lives (56 years), so why should the writer judge the Bill Gates of 10 years ago (at 46 years) and compare it with the late Steve Jobs (at 56 years)