It is sort of interesting to me that I'm hearing so many refer to Seattle as if this is the same strength team as the 2013 rendition. That was truly a great team but (unfortunately for them) in 2014 the Seahawks let key offensive and defensive pieces get away. Their offense is more limited and their defense is weaker (DL and Sec). They were more explosive and dangerous last year because of these now missing players and although they posted good numbers this year, their numbers are somewhat illusory because of playing weaker opposition and many weak QB's. (hence- SOS & Team Opposition analysis as the key variable).
The Seahawks will rely too much on Marshawn Lynch to produce their positive offensive outcome. This is where they are very offensively limited and I believe where they will fall short in the Super Bowl. I must also add that by all rights, but for weak-ass coaching on Mike McCarthy's part- they shouldn't even be playing this weekend.