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...between the 2009 Mariners and the 1927 Yankees, I'd wager 130 of them would be close, exciting games...one or two would be Mariner blowout wins and 30 would be Yankee blowout wins...the Yankees would probably go an average of rough 108-54 in those matches, but there would be many games where both teams had great chances to win.
A large difference in overall talent does not exist at the highest levels of pro sports..the FIFA World Cup...or the Major Leagues from almost any era aside from the period before the 60 foot 6 inch mound distance.