I agree with terrillja. There is so much life on the Duane. On my last dive, my buddy was ahead of me, and shined his light through a grate. 2 Goliath grouper were staring at him from about 3 feet away. Good thing the grate was there
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We used Divers City and they let up off up current, and picked us up down current. So we made a slow drift dive. It was great, and we saw the whole ship without having to worry about the current. Unfortunately, Divers City is closed now. At least they were in the process of closing when I was there last May. They said they would be open till the boat was sold. No other charter does the drop off and pick up on the other end to my knowledge.
Also, there are usually many less divers on the Duane, and that makes it nicer. I've only seen it crowded once. Where as the Speigle might have 100 divers on it at peak times
But it doesn't really matter. If I'm going to the keys, I'll dive both.