No the GT500 is the top Mustang not a one off. They are limiting how many are made. Just like the DemonSo GT500 is no longer the top Tier Mustang Cobra, but a one-off "because we can" car?
Really The Demon is just a built HellCat. Many changes but the base is the same. The 2000 Cobra R had different engine then any other mustang at the time(not a built base). I compare the Cobra R to the 429 Boss way more then a DemonThe Demon is more like the Cobra R, and no one got upset about those. We all knew it was destined to be limited from inception.
The Demon is a built HellCaT like the GT500 is a built GT350/GT Nothing more nothing less.