I bought the DVD for nostalgia. I was pretty astounded at how awful the dialogue was. I didn't remember it being that bad as a kid.. Sonic says the words "yo" "cool" or "mondo" in almost every sentence.
I found transcripts of episodes online, which is where I got those dialogue snippets.
SatAM has better animation than AoStH yes, but nothing was dark about it. At all. It was a typical kids cartoon with cheesy dialogue.
And I agree that SatAM's intro was far better. I loved the intro. Too bad the rest of the show is generic furry garbage made by guys with hard-ons for Star Wars. (Swatbots were knockoffs of Stormtroopers, there was a wizard who talked just like Yoda. Snively was a lot like Darth Vader's second-in-command guy who I don't know the name of, and Nicole was like R2-D2.)
SatAM is just embarrassing to watch. Yes, AoStH had some pretty terrible animation, but it did have some humor to it, and unlike SatAM, never took itself too seriously, which makes it somewhat watchable.
Because being a bumbling idiot is how the character was intended. Yes, Robotnik has an evil side too, but SatAM showed him as being ONLY evil. His voice was way too dark and he lacked any of his humor.
Not to get off-topic, but I liked Robotnik's Sonic Adventure incarnation best, because it managed to blend both his comical and evil side. He was a bumbling narcissistic moron who would throw temper tantrums, but also had his moments of darkness, like blowing up an entire island (That people were probably ON during the explosion!) sent Sonic falling to his doom from space, and pointed a gun to Amy's head.