You really couldn't find two more different shows, but I think Great Comet is miles better. The staging and tech elements are rightfully praised, but I think the complexity and originality of the writing shouldn't be ignored. It seems that some people are left cold by it, but the last 15 minutes of the piece are quite beautiful and moving, as are several earlier segments (No One Else, Dust and Ashes, and Sonya Alone). I also think it's one of the best casts working on Broadway right now, full of unique voices and actors that usually wouldn't be seen in a typical Broadway musical.
Dear Evan Hansen has a nice score and some very good performances, but I can't get past the problems with the book. I cried when I saw it, but I was more frustrated by the shortcomings that went unfixed. I'm glad it's striking a chord with lots of people, but I don't understand the effusive praise.
I am a firm believer in serendipity- all the random pieces coming together in one wonderful moment, when suddenly you see what their purpose was all along.