I have to confess I only used my $59 C102GT a few times when I first bought it. My C80ED gives sharper and more contrasty images of planets, the Moon and double stars. The improvement is not subtle.
Besides, I like the smaller format of the C80ED much more for grab-n-go. Also, the shorter tube is ergonomically superior when going from observing near zenith to near horizion, or vice versa. A foldable camping stool is all I need for the C80ED. A MicroStar head on a simple tripod is sufficient for the mount.
Just had to say it.
Edited by Sarkikos, 24 July 2017 - 10:04 AM.