I like how there hasn't been a single person who has argued on Superman's behalf...and has actually ridden both rides.
By the way, rides at 3pm on Superman pale in comparison to 5pm rides on Dash. The two hours must transform Ride of Steel into something completely different, since you pointed out there is NO WAY Dash could be as good as Superman under equal conditions. Not to mention how you would be an expert on the topic, considering the number of rides you have on Boulder Dash.
Dash gets my vote.