I've read both and I can say Bakuman. is the better one (maybe coz I'm biased against DN)... Bakuman. has almost the same amount of thrill as DN despite being more on the Comedy/Drama side. Another amazing thing I'd say is the romance. Unlike DN, the main motive of the protagonist is based on romance. And I'll tell you, even if you're not a sucker for romance, you're gonna enjoy this manga.