PJ2.
Your statement about SFP was straight out wrong. The reason there has been a bit of reaction to it is that like many posts on the internet now days it was made as a statement of fact with an air of authority about it. This kind of confident posting of inaccurate information is rife and frustrates many.
There are many differences between SFP and non-SFP. One difference that I notice is that the thrust reduces to idle in two seconds if you quickly close the thrust levers rather than five seconds on the non-SFP. It’s much nicer on the SFP than the non-SFP as you can more accurately control the point of touch-down in gusty conditions. Also, if you accurately set your Vref it is slower than on the non-SFP aircraft by a knot or two.
Hope that helps, Cheers