The main thing I noticed is that the photoshoot/commercial is giving Hedwig!Darren a much more pretty-fied look with the soft lighting and white background. If you look at the previous Hedwigs, especially NPH and Andrew Rannells, they're more sweaty and gritty.
Here's my confession: as a musical, my interest in Hedwig is like non-existent LOL Never watched the movie. Even after seeing the show last year, I had (and still have) no interest in listening to the soundtrack. The only reason I went to see it was because of NPH and Darren is the only reason I'm going again. The things we do as fans, right?