Stangs, I would classify the sound as "more detailed."
I went from several Pioneer Elite receivers to the 805 (before the Elites I had an Onkyo). The Pioneer Elite is definitely a rounder sound, but I think the Onkyo does a better job at keeping frequencies flatter, overall. The sound seems more detailed, in general, not necessarily "brighter" though.
I'd say the Pioneer Elite sound is similar to the Denon sound.
Of course, this is my opinion, which is VERY subjective.
LG OLED65C6P / Marantz AV8801 / D-Sonic M2500 / Oppo BDP-103 / PS4 Pro
GR Research LS-9 / GR Research X-Voce / GR Research AV-1RS / Oppo PM-1