How closely did the Gay class follow wartime fast boats?

Were the Dark and Gay fast patrol boats or the Brave fast attack craft direct successors to wartime motor torpedo and gun boats?

The Gay class shared some similarities without being a straightforward successor. The other two class lineages remain unresolved.

The Gay class shared similarities with wartime fast boats, although a direct successor relationship is not established here. The Dark and Brave classes receive no separate assessment. Their relationship to wartime boats therefore remains unresolved in this exchange.