Hi Sid
I am not so certain that RAF considered the Henley as a Ju 87 equivalant. The Henley was conceived as a light bomber to REPLACE the Battle.
I don't think the RAF Brass ever considered dive bombing as an option within the Force.
As you know the development during the 1930's particularly on the fighter side went extremely fast and by the time the Henley flew it was thought its performance, although much better than the Battle, was STILL not good enough for it to survive in a battle environment, so it was decided to use it for other purposes.
Playing with "what ifs", I personally believe the Henley would have been far better than the Battle during the Battle of France. It looks neat and a bit Hurricane like, so, while I have no figures relating to its stress capacity, I believe its turning performance for instance would have been far greater. Roughly 30 mph faster it would have had that much better chance to escape as well. Enough? We will never know...
Cheers
Stig