I noticed quite a difference going from a low end sony to my 1804 Denon and then from a sony DVD player to a Samsung. The Denon had a little more clarity at lower volumes. The Samsung seems to have more output to the receiver than the Sony did. I was listening to movies at -15 to -10 with the Sony and now listen at -20 to -15. So there is a difference in the electronics and signals that they send.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70