there have been some studies done and from what they have said is ...
if you have 2 wild adults whose young is hatchery raised the survival rate is x % (different for each river system)
if you were to spawn 2 hatchery fish and raise there young also, in the hatchery the survival rate goes down by 40% i just 1 generation.
seeing how the first and some will say the most important part of their lives (hatchery fish) is spent in a sheltered and controlled environment (slow water and fed regularly thougout the day)does give a little more weight to the argument that they aren't the same.which is why to my understanding they always do their best to use wild fish for brood stock.
i hear what you are saying about where the fish is and water conditions. i had one week that was really good where i would often get into fish on the first couple of casts. i landed a good number of them and the river was unchanged that week.all the fish landed i got from pools that would give them lots of time to rest and relax.
all that being said i still think the wild fish have a little more spunk!