Going back a few years, the lines between "bus" and "coach" were often quite blurred. I grew up in Y-type land - some had narrower 2-piece doors, others had 4-leaf "bus" type doors. Some had "panoramic" windows and forced ventilation while others had smaller windows which could open. It was very much mix-and-match, depending on the requirements of the operator, and it wasn't unusual to see a vehicle that had been delivered as a bus being re-seated later in life to serve a different purpose. That was long before true low-floor buses were a thing, though.
To me it makes sense that a longer stopping route should be fitted with coach seats, but retain a bus layout, especially when accessibility is a key factor. Occasionally we get a high-floor coach on our local route, and while someone in a wheelchair isn't disadvantaged because there's a lift fitted, it's a major pain in the backside for those with shopping trolleys, especially when some drivers refuse to get off their arses to either help lift the trolleys into the vehicle, or open the underfloor lockers.
