I have the treasury edition of The Empire Strikes Back adaptation , to me it is the best way to enjoy it . The colors are much better than in the monthly comic and Al Williamson and Carlos Garzon’s artwork really shines in the large format .
One of the first Conans I ever read was a treasury edition (lent to me by a High School senior when I was 13). Pretty spectacular format! If I remember correctly it featured the ‘Rogues in the House’ adaptation.
There was an article somewhere explaining how/why the various versions of TESB had different colourists. The paperback I recently re-acquired has some bizarre colour choices ie Lando with a green shirt and red cape!