How good might a Supermarine Swordfish have been?

How good might a Supermarine alternative to the Fairey Swordfish have been?

It sounds appealing, but reliability and the ability to produce enough aircraft are suggested reasons for the Fairey choice.

Reliability and the ability to produce sufficient numbers are offered as probable reasons for choosing Fairey's Swordfish. A Supermarine alternative receives a favourable initial reaction, but its possible performance remains unexplored. Blackburn's later production of the Fairey aircraft receives a brief mention.