The key difference however is that the RTS has a better ride quality by far.
An average Gillig Advantage or Advantage BRT has a lackluster ride quality, as it's chassis and suspension is low grade. As such Gillig uses a larger than usual tire in a poor attempt to compensate for what the suspension is missing, to no avail.
And these are CNG buses I am riding, which only worsen the impact as the weight makes the weight distribution uneven. I could go on, but I'll cease my rant here.