While the worlds do look similar, and both are referred to as Hell, it's unlikely they're the same place.
When the accident is recreated in "Repairs," the world is brightly lit.
However, Maveth only has a sunrise for a short amount of time every 18 years.
Will: Even if we do miss it, there'll be another one in 18 years.
Since the sun last rose over 13 years before the episode in question, the timing wouldn't work out.
Secondly, the world shown in "Repairs" is described as a different universe, while Maveth is a distant planet in our universe.
Simmons: This "ghost" is a man trapped between our universe and another.
Additionally, I can find no Word of God linking them.