At any rate, I'll offer my opinions on the two coasters, not if MF is groundbreaking or not (cough).
When the steel coaster poll is finished, I think SRoS at SFNE will prevail over MF. Most of the people who have ridden both prefer Supes to MF because the layout suits them better as it has more airtime hills, etc. But for me, MF beats out SRoS at SFNE because of the uncontrollable speed througout the rides course. There are *zero* dead spots on it. I am an extreme height and speed freak, and MF obliterates almost every other coaster out there in those categories. It's got suprises, amazing range of forces, and atmosphere. Opening weekend thoughout the entire year, MF had this electric atmosphere that I've never felt on any other coaster I've ridden. Each and every train would come back in awe of the ride. Comments would continue down until the midway where they saw their excited/horrified expressions on the ride. Superman had a GREAT reaction too, but it wasn't the same as MF.
Let it be known, I am one who adores night rides on coasters, and I never got one on Superman. I did get a load of them on MF however.
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In the future, packages will be sent to distant worlds by BEAMS OF LIGHT! -- Space Mountain WDW exit