W-class destroyers and Black Swan sloops had similar displacement

How did W-class destroyers compare in size with Black Swan-class sloops?

Both were a little over 1,000 tons, with little difference in size.

Black Swan-class sloops and W-class destroyers were both a little over 1,000 tons. Their different labels therefore did not imply a large difference in displacement. Hunt-class destroyers are also said to have used the same hull as the Black Swans, derived from an earlier sloop design. The earlier sloop class name is unclear in the available account.