I haven't read either of them, but from what I saw on Wookiepdia, the Battle of Jakku comics contradict a bunch of stuff from the Aftermath books, so Lucasfilm isn't even sticking to stuff established in those books.I'm not sure I'd take anything stylistic in Aftermath as an indication of a larger policy, from the present-tense narration to the coy, who-could-this-be? avoidance of using Jar Jar Binks' name.