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but I think the word is chine. With an n. Why don't you delete and start over?
If a hull has a lot of rocker with a hard chine against a soft-chined boat with much less rockered hull, the soft-chined boat will likely be faster all other things being equal. A fine ended boat may be faster than one with fatter ends. A plumb bow boat of the same length as one without a plumb bow could be faster. A boat that is quite skinny compared to its length will likely be faster than one that is wider compared to its length - except for time lost recovering from a capsize if it is really skinny. :-)
What is the real question here - are you trying to compare boats? Hull speed is about multiple factors, which boat designers are quite good at discussing and the rest of us should probably not try to get too fancy talking about.
Excluding other factors, a rounded cross-section hull will be more efficient than any other shape. It has less wetted surface area. Can't quote you chapter and verse, but, do recall, for example, John Lockwood of Pygmy boats, explaining that a multi-chine hull was about 3% more efficient than a single chine hull. The multi-chine is closer in shape to a rounded hull. Similarly, a soft chine is closer to a rounded hull than a hard chine.
If the wetted surface is the same, both hard chine and soft chine would be the same speed. This was asked on the Guillemot building site and Nick Shade posted a computer graph of the same boat with hard and soft chine - BUT - the same wetted surface. The computer model was worked from wetted surface backwards.
The caveat to this is however: converting a boat from a soft chine to a hard chine usually creates more wetted surface and therefore the hard chine boat would be slower.
The fastest hull is always a half circle shape but very tippy and almost impossible to paddle.