I dunno which one was the better Superbowl, I'm no judge of that kind of thing, I know only which one I enjoyed better. And it was SB51.
The reason is the difference in the fanbases.
Both Seattle and Atlanta were arrogant fanbases, That's fine, so are we at times. The fact of the matter is though that the Seahawks had earned the right to be arrogant. Their team was a perennial contender and the defending champions. They were very, very good and knew that they would continue to be very good for years to come, and had no reason to be afraid of us. As last season's champs, the fans had earned the right to strut a bit, and they as a team were trying to build a dynasty of their own. The fans not only were confident, they had every reason that they should have been confident, especially against a Pats team that while still very good, was beginning to look like its best years were behind it. They thought that they were going to cement a new dynastic legacy on the ashes of the old one, and the team was more than good enough to do it, except for one bad play right at the very end of the game they would have managed it.
And when it didn't work out for them, for the most part, after a moment to grieve and deal with the initial emotions of a defeat of that magnitude, Seahawks fans started asking the right questions, talking about the playcalling and mistakes their team made, talking about how to do better the next year, they acted like fans that had been there before, disappointed but still committed to their team and determined to keep trying to put it over the top.
Atlanta on the other hand hadn't proven crap, they'd made the Superbowl for the first time ever, fans were excited but clearly had no idea how to handle the excitement. The overexuberant braggadocio that is the hallmark of the bandwagon fan was their calling card. They were the nouveau-riche trying to impose their noise on the old guard who'd been there, seen that, and knew just exactly how silly they were being in their overreaching presumption.
And when their team failed? Oh boy. First of all half of them didn't seem to have any idea of the rules of the sport, Amendola's 2 point conversion was widely seen as illegitimate because many of them didn't know the end zone mechanics, just for one esample. TV's were smashed, jerseys were burnt, a team that's probably going to be back in the playoffs next year is going to make a lot of money on fans replacing their regalia after the petulence of a fanbase not used to the heights and so not deserving of victory. It felt so good to tell those fans to shut up and sit down, and be the team that has been there before and knows how it's done.
So yeah. SB51 for me. I don't want to try to analyze which one was harder. But I know which one felt better.