Yep, the difference is Sonic doesn't wear a long-sleeved, red-and-white horizontally striped shirt.
he has red and white shoes though. I already found him amongst the fake Sonic's the moment I glanced at the Green Hill one.
The train headed for the Mystic Ruins will be departing soon
https://www.youtube.com/watch?v=fK6nDe1aoqo
To be fair... the Mystic Ruins is likely surrounded by thick jungle and mountain range.
And by jungle, I don't mean the "Jungle Area", but if you go to the furthest to the cliff-edge of the jungle area (where, Dr. Eggman's base is), you'll see that the "
skydome" consist of even more vast jungle surrounding the mystic Ruins.
Mystic Ruins stations consist of a railtrack heading into a tunnel to the side of a cliff-face. It could be possible the railway line between Station Square to Mystic Ruins goes through thick jungle and tunnels through cliffs and mountains that even Sonic would struggle to get their by foot.

Bill Wise, the voice of Knuckles in the Sonic OVA, passed away last month at age 61.


Source: https://x.com/sonicstadium/status/2056510371783979224
he will be missed.
