Gantz Omnibus Vs Singles, Print and Art Quality

Hello. I have a complete omnibus set but am considering upgrading to the singles. I dont collect manga. Only manga I ever read growing up was gantz, so I just want best quality.

I re read it for the first time last year but went digital because the black looked so good. And I read online the singles quality looked better than omnibus, the art and deep black and printing and such.

I can no longer find the discussion. Can anyone confirm or deny the singles have better image and art quality.

Just want the best set to keep for life.