Can't say I've ever tasted rooster. Maybe because they never sell rooster meat in grocery stores... But I've read that no, it doesn't taste the same. Just as gross I'm sure, but different.
Roosters are also more aggressive. And in commercial agriculture that doesn't work well. Even hens will peck at each other under the high density, high stress environments. Roosters require food and water, so they sex the chickens as soon as they hatch and send the roosters to their deaths.
I used to work with farmers and they would get very upset if they were sent roosters instead of hens, and "have" to kill them themselves.