These two will likely have similar performance, so if you've got a preference for one over the other or have more familiarity, you may want to choose between them that way.
From my own experience with entry level or close to entry level receivers from Yamaha and Denon, the Denon may likely be slightly better for music, whereas the Yamaha might be slightly better for HT usage, so you're listening preference may make a difference as well... -TD