By all accounts, these boats are faster than the multihulls.
by grnd (2020-11-25 11:09:19)

In reply to: That is amazing.  posted by Killian

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The multihulls never breached the 50 knot barrier (very close, though). The unofficial reports are that these boats have exceeded 50 knots, and some teams expect to be well over that mark.

Correct. The hydrofoil cuts the drag substantially so ...
by Barney68  (2020-11-25 11:24:11)     cannot delete  |  Edit  |  Return to Board  |  Ignore Poster   |   Highlight Poster  |   Reply to Post

the speed goes up. The boat is flying through the water on a submerged wing.

Amazing technology. Simply amazing.
The last two rounds of multihulls were foiling as well.
by grnd  (2020-11-25 11:31:12)     cannot delete  |  Edit  |  Return to Board  |  Ignore Poster   |   Highlight Poster  |   Reply to Post

I imagine these boats are substantially lighter and there have been advances in foiling design and understanding over the past several years.