as is my habit to go on and on - I will do it again LOL! - I have been thinking about the statement that there is absolutely no difference visually between a quality SCT and a quality medium FL (say f6) Newtonian that seems to me to have been made. One BIG difference i have always noticed is the superior resolving power of a newt compaared to my mates SCT - i realise SCT's must have come a long way in 10 years - maybe the modern ones are much better?.
I assume we are talking about they are identical at low power? try this little test when the gods next align and the seeing is extraordinary - what is the maximum magnification you can reach with your SCT? (and still be sharp as a tack - as good as low power is!) Try the moon, its the easiest to test on. I have a number of times seen around 1000X (not a typo one thousand times) using two stacked barlows and my mates quality Masuami (sic?- forgetten how that is spelt?) EP with a few of my mates handmade newts - even with a 6". I have regularly seen 600X achieved comfortably on planets/moon - no problem - steady as - like looking at perfect image - with these scopes. Not everyone is happy with just low power stuff. Cheers
And thnx for humoring me on this

Fringey
Another thing I have noticed is when someone has spent thousands of dollars on a SCT they are very unlikely to admit that it is anyway different to another scope - my mate still wont verbally admit after all these years that his SCT is in anyway visually inferior LOL - he just grumpily changes the subject!

And as one of the legends of Aussie astronomy always says when asking about the quality of a scope "does it resolve Antares (to a double)?"