No.
Denon has Audyssey (especially Audyssey Dynamic EQ), which Yamaha does not have (they have their own room EQ, but not an equivalent Dynamic Subwoofer/Bass EQ like Audyssey Dynamic EQ).
So ONLY because of this, I consider Denon & Marantz a better brand.
In Direct or Pure Direct mode, you won't hear a difference at all between them.
Amazon often has big sales on current/previous Denon AVR models. So I would watch for them. For example, a Denon 3000 series may be on sale for $599.