You're confusing yourself. There is no positive evidence in canon that the shields WERE effective. There is positive evidence that they were NOT, and that comes from Weyoun in "A Call to Arms." That is the only definitive statement either way, and you have claimed it "contradicts canon."Good. Now answer the OTHER part of the question: on what do you base the statement that Defiant's shields were more effective than Odyssey's shields?
On What Base was Defiant's shields effective:
a. Defiant's shields are effective untill proven otherwise by canon.
So I'm asking you: what specifically does Weyoun's statement contradict? Other than your assumption?
Inequity of outcomes is the only precision possible when comparing historical events. A battleship either sinks or it doesn't; historians must seek to examine why one battleship sank and the other one did not, and which differences between those situations had causal power and which ones didn't.You are using the most imprecise arguement you possibily could muster.
More effective shields would have resulted in a different outcome for this battle. The outcome, however, was the same: defeat.
Nor does it establish effectiveness; it is, at best, inconclusive of both positions.The episode in question does not establish ineffectiveness.
On the other hand, Weyoun's line in "A Call To Arms" is conclusive, and is not contradicted by this or any other episode.
Then you have nothing more to say. Defiant's shields are either effective or they are not. We have a canon reference that says they do not.I regret to inform you that I don't deal in apparent magnitudes on this level of discussion.
Eddington does NOT say that the shields are actually repelling Jem'hadar weapons. He says they are "down to eighty percent." Not evidence of effectiveness.2)The Die is Cast makes litteral mention of the shields holding by Eddington.
As are Odyssey's shields in The Jem'hadar, despite being easily penetrated by their weapons.3) In Starship Down Defiant's shield are visibly accounted for.
Irrelevant, since Weyoun states that the shields ARE effective in this case. And this case--alone--is the case that is definitive of shields being effective against Jem'hadar weapons.4)Call to Arms it's self proves that While Dax says the shields are at 35% the three Jem'Hadar appear to be striking bare hull.
And again: none of this should be surprising. Defiant was designed to fight the Borg, not the Dominion.