Complex sentence: Harvey feels that Raymond's work suffers in comparison to Milton Caniff's contemporaneous work, with Raymond's failings as a visual storyteller less noticeable on a weekly Sunday strip, where the space afforded played to his skills as an illustrator.
Split into simpler sentences: Harvey feels that Raymond's work suffers in comparison to Milton Caniff's contemporaneous work. He believes Raymond's failings as a visual storyteller were less noticeable on a weekly Sunday strip, where the space afforded played to his skills as an illustrator.