Both teams won the Western Division in their respective league.
Both teams beat the Eastern Division champion, and Wild Card representative from the East.
Both teams won their respective LCS in 6 games.
Both teams ended their LCS by striking out a corner infielder looking.
Both Hamilton and Ross are outfielders.
Some similiarities to the Giants last World Series appearance in 2002 are:
The Giants are facing a team in both series(Angels in 2002, Rangers in 2010) that are making their 1st World Series appearance in franchise history.
Bengie Molina is the starting catcher for both the 2002 Angels, and the 2010 Rangers.
The Giants beat the Braves in the Division Series in both 2002 and 2010.