I've been on several (DD,TS, LR, Gemini, Racer & more) and LIGHTNING RACER wins hands down. From the incredible ride, layout, actual dueling tracks, ability to actually see the competition and thrilling announcement of the winner, this is the best of the aforementioned coasters.
Dueling Dragons is amazing, and the foot to foot crossovers are great, but you can't even SEE the finish of the other coaster!
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"You have to scale a lot of lift hills to coast easily..."
Jason