There's no reliable evidence re difference in noise with/without silencer. Firearm discharge within a normal dwelling ie soft furnishings etc will sound completely different from how it sounds outside in open space.
If we are to believe the silencer was found with blood, paint and a strand of hair attached to the outside we also have to believe that JB overlooked all of this despite having to turn the silencer a number of times to detach it from the rifle.
The pathological evidence doesn't support a "fierce fight" in the kitchen or anything approaching.
I think you’ll find there is reliable evidence that firing a rifle with a silencer attached reduces the sound significantly, hence why people buy them 🙂
They’re always used to shoot rabbits, so as not to scare them off target
I think we should believe the silencer was found with blood inside, unless you’re suggesting the police, ballistics, forensics and scientists had a mass hallucination when discovering the blood inside and sending it for analysis. Likewise the paint, which turned out to be an exact match of the paint on the mantel — and came from where the scratches were found underneath the mantel. They established the scratches were made in a pattern conducive to there having been a struggle.
The pathological evidence from Nevill’s body which showed his skull smashed in exposing his brain, including the injuries where he desperately tried to defend himself is consistent with more than a fierce beating/struggle/fight — so the pathologist and police said.