These 2 items are not on an even footing, the Marantz SR 7500 (discontinued model) had an original SRP of $1999.. the Denon 2307 had a SRP of $799. the equivalent Denon model to compete with this for features would be the AVR 4306.

As such a direct comparison between the 2 receivers will naturally leave the 2307 lacking.

If you have found these 2 receivers for the same price, you are giong to get a lot more for your money with the Marantz, hands down. Be mindful that is is a discontinued model, however, and could possibly even be reconditioned.