It's creepy, but, tolerable.
Btw, a while back I tried the JP version of gen1, specifically Pokemon Green.
From the original Red/Green to later versions there were definitely a few interesting minor changes, like reducing really bad screen flashing during the Thunderbolt move, or fixing the accuracy of Swift, or changing the names of the "Boy Scout" and "Girl Scout" trainers (eventually campers and picnickers, even in JP releases).
But I couldn't figure out if the infamous "JP Lavender Town theme" was actually any different, or if that's just a rumor.
Tonally I think it's the same. The quality might've been worse, more grating? It was uncomfortable to listen to, but maybe that's just Lavender Town. I'm not sure if it was *actually* any different, or just me looking too hard for something.