Could my ancient Yamaha RX-V3800 actually have better sound than my RX-A3070?

I know both of these receivers are discontinued -- the RX-V3800 was old news many years ago and the RX-A3070 is also discontinued. So, my RX-A3070 went on the fritz and it's going in for service (just under the wire on the 3 year warranty thankfully). I had given my RX-V3800 to my parents and was able to borrow it back since they are out of town for a few weeks. To my surprise, I immediately liked the way my old RX-V3800 sounded as opposed to my RX-A3070. Richer, fuller, more immersive 5.1 surround sound (which is all I'm running). I'm running "Surround Decode PCM" on the RX-V3800. Not sure what I've been running on the RX-A3070.

Is it possible that the old receiver is actually noticeably better than the newer one ever has been or is this likely settings? I am anxiously waiting to get my RX-A3070 back so I can do some back and forth testing between the two and see if I can get my RX-A3070 to sound as good as what I'm hearing now.

Any thoughts on this?