Pat did my last FI renewal. Utter gent.
In the day some people used to do the test returning to an uncontrolled airfield with a fiso using a none published NPA. Sometimes landing on a grass strip.
The further you took the test north there were differences. After !!!!e loads of experience later I would say it was more real world flying not some test setup. Certainly not easier but not more difficult. I did go full power with both engines on my ils single engine because we were decending below the glide at full chat on the working engine. These days I would know it was wind shear. Them days it was both up and then one down and nothing said.