Well, I’ve never watched the dvd or Blu ray versions. And I only watched the D+ version once in a massive marathon building up to seeing The Rise of Skywalker, where I watched the “official” versions of the entire saga (including Solo and Rogue One) in chronological order. I hadn’t watched any version of the SE beyond the ‘97 version (which I hadn’t watched since the prequels theatrical releases) and I hadn’t watched the prequels themselves in over a decade so there was a LOT of new stuff to take in. Heck, the audio mixes themselves on the OT were so different from what I was used to that I’m not surprised I missed a detail like Vader’s voice being tweaked (especially when it’s the same recordings just mixed differently).
But listening to it in a short clip by itself, yeah it’s very obvious it sounds meddled with.