What set sealed Bowman's fate?

[darkhorse9]

When the baseball card wars heated up it all came down to sales. Which card set did the kids prefer. Certainly Topps hit a home run with the 1952 set, but Bowman had time to fight back. They never could. I doubt kids really were brand loyal back then, so it was all a matter of who delivered the best product.

All things considered which set was the beginning of the end of Bowman's life? Here are my thoughts on each set. What do others think

1952...the set was too similar (almost identical) to the 1951 set. With Topps changing the game, Bowman's fate could have been sealed by the ultimate in standing still. Could that have been simply too much of a lead to make up?

1953...Bowman gave a valiant effort with the Kodachrome photos, but the cost got away from them. This could have been a game changer answer to 1952 but it was just too expensive. Dropping to a black and white series killed any chance at momentum.

1954...a plain ugly set. Bowman went back to colorized pictures while Topps had actual photos. Numerous errors and the loss of Ted Williams hurt as well

1955...a decent idea for a set, capitalizing on a new fad while Topps set was into their (in some cases) third year of using the same photos for players. The inclusion of umpires was a dog of an idea. No kid wanted pictures of umps.

Which set was the biggest dagger to Bowman's efforts in the war?