Well, Amtrak's plan, under George Warrington, was to eventually rebrand the Empire Service as "Acela Regional" as well. Basically, all NEC trains would be Acela-something. Thankfully, that plan was stopped before it spread beyond the Acela Express and the Northeast Direct renaming to Acela Regional (now, simply the bland, boring "Regional" name).
So, that's probably why the Turbos were getting the Acela paint.
So, that's probably why the Turbos were getting the Acela paint.