Original Doom and Nu-Doom are essentially two completely different entities yes, as OG Doom was actually a petty short sighted autistic tyrant prone to illogical and emotional spats whenever his hyper fragile ego was bruised.
Nu-Doom is a charismatic ubermenschen whose tyranny is iron fisted inside a velvet glove and he exudes class and decorum, even when he's being petty. You can't help but admire him for his sheer balls.
I prefer Nu-Doom as I feel it makes for a more nuanced, interesting villain - the allure of an enlightened despot is seductive and it's an idea that's captivated people since time immemorial, the idea of the incorruptible man with the clout, intelligence, and ruthless capability to do what is necessary for maximum good.
If anyone could write Reed well/like he's supposed to be written, they'd be the ultimate juxtoposition - Reed with his elastic and flexibility powers representing modernity and liberalism, the change and uncertain promise of new idea's, while Doom clad in his antique armor and wearing the rainments of an old fashioned noble is the very image of conservatism and old ideas - a noble elite who is better than everyone else by virtue of his own natural prowess and birth, giving him the right to direct everyone else. Doom allows us the comfort of being slaves, whereas Reed presents opportunities and requires humanity to grow. Fundamentally, Reed represents optimism, while Doom is cynicism.
But, comicbook hacks can't write, soooo
yeah, Nu-Doom comes off as the Golden Boy and Reed is barely a positive figure