The Botvinnik - Smyslov Rivalry

How many games did Botvinnik and Smyslov play against each other? I looked at four databases and received four different answers...

121	GMchess.com (Smyslov collection)
106	Chessgames.com
102	Chesslab.com
98	GMchess.com (Botvinnik collection)

...I'll look at the Chessbase online database when I have time. For a number of reasons, their data is harder to extract. In any case, further analysis is required. (To be continued)