I love SDD. It is a great super smooth family coaster. It is an awesome addition to DHS.
But.....
Hagrid's is one of the best rides I've ever ridden. It literally took my breathe away the first time we rode (first row!)
It is fast. It is smooth. It has an awesome storyline. It goes backwards. The list goes on and on.
Also leaning over and riding while holding the handlebars is so much fun.
No comparison.