The difference is significant in print form. In large print the imperfections are glaring while the perfections are endearing. Most of this is hidden on an LCD. Especially small, average resolution and uncalibrated displays. What looks wonderful and vividly colored may be out of gamut and can't be printed to any resemblance of the display.

I could not tell you as I don't have an 85 mm lens but I know the ones I have. And I am not sure what you are asking. Is that an 85 mm f1.8 set at 5.6 aperture or a f1.4 ? The fact that I am discriminating between a 1.4 and 1.8 indicates I know there is a difference. And for the lenses I have, I have read and researched the differences and have seen the differences and can make the decision or the choice if this is important or not. This level of detail is important in your progression as a photographer and gives you the ability to speak with, learn and collaborate with others.

If you want to be a good photographer you need to print. Print is feedback. It tells your where there were error or omissions.