After reading the original message, I was going to jump in on this but it seems everything I was going to say has been said.

So I'll second the posts regarding the weaker genetics of stocked trout, which can lead to weaker genes in wild trout.

Also...
Quote Originally Posted by WarrenP View Post
You would not be able to tell one from the other if they are side by side.
Not necessarily true. As other have stated, the fins of stocked trout are typically damaged. And I'm not sure if its directly related to the damaged fins, but it seems to me that stocked trout put up less fight than wild trout.