From my perspective, as the person with the hundreds of hours of listening to the English voices specifically to analyse every last thing - the guy in 7.4 does certain consonants differently, and JB always does those ones the same, even as Growingway and the random Garlean soldier.
Plus, I've got this, I don't know exactly, but when people speak I feel their voices as if it's me making the noise (so, in my face/throat etc. in the right places) and JB's is one of the most distinctive physical sensations I've
ever felt in nearly four decades of living with this whatever-it-is. Hence me fighting so hard to prove Nald'thal wasn't him, and having to find other reasons that weren't just "my nose feels wrong, it's not him" so people didn't think I was unhinged
