The two are eerily similar. It's a very artistic effect he achieved. The whimsy seems uncharacteristic for him.
He posted this thank you video after his second AMA: https://www.youtube.com/watch?v=ynQ5ZhxYAss
This was after his third AMA: https://www.youtube.com/watch?v=9p4bm-RAlLA
So not really out of character, at least for post-Microsoft Gates.
But probably perfectly characteristic of the design firm he hired to do it for him.