I think the roundies were better till the black matrix tubes
( chromacolor etc ). Still there is something about the roundie.
A perfect one in a dark room & older content just look "right".
Another thing about roundies is most were clones & when right
they all came close in pix. Latter sets were rarely clones &
the pix quality varied a LOT brand to brand. Also the wear out
time varied. Some sets after a while just had so many little
problems you couldnt money wise make them like new.
Up til the 70's RCA & Zenith were the high end sets.
Middle sets were Maggies & Sylvanias. Low end was GE, Emerson
& most store brands. Time has proven that, just see what
has survived
73 Zeno