Better late than never, but I found some interesting stats on the WC vs Collinwood history.
Since 1975, WC leads the series 22-19.
WC has out scored Collinwood 823-776, averaging 20.1-18.9
WC's longest win streak is 6 from '07-'11 (met twice in '09)
Collinwood's is also 6 from '84-'89